1
|
Bhattacharjee H, Das D, Bhattacharjee K, Buragohain S, Javeri H. Transmittance characteristics of transparent hydrophobic acrylic foldable intraocular lenses that were in vivo for a prolonged period of time: A UV visible spectrophotometric study. Indian J Ophthalmol 2023; 71:3663-3668. [PMID: 37991301 PMCID: PMC10788741 DOI: 10.4103/ijo.ijo_273_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 06/22/2023] [Accepted: 07/03/2023] [Indexed: 11/23/2023] Open
Abstract
PURPOSE To record experimental data on the spectral transmittance characteristics of transparent hydrophobic acrylic foldable IOLs, which were in vivo for a prolonged period of time and explanted under clinical indications and also to compare the data with that of corresponding control and crystalline lens along with review of the relevant literature. METHOD Material and make of each of the explanted intraocular lenses (IOLs) as well as pre-explantation clinical status of the eyes were confirmed from the medical record. The transmittance of wavelength from 185 to 900 nm of each of the selected IOLs was measured using Shimadzu UV 2600 UV visible (UV-Vis) spectrophotometer in double-beam configuration and probe version 2.16 software. The data obtained were statistically analyzed. RESULTS The mean transmittance of 12 clinically explanted IOLs at spectral range 300-700 nm was 49.5% ± SD 6.9%. This value was 10% and 38% less than the corresponding clear (59% ± SD 0.4%) and yellow (87.5% ± SD 0.4%) control, respectively. The mean transmittance of the analytes in the UV range was 43.3 ± SD 6.9%, and it was almost similar to the control. The data showed wide variations without good correlation, and it matches with the human crystalline lens at the age range of 50-60 years. All eyes were otherwise healthy, and none had age-related macular degeneration. CONCLUSION In comparison with fresh IOL with a yellow filter, light transmittance at the spectral range 300-700 nm was found decreased in all the IOLs, which were in vivo for an average period of 12.25 ± 4.4 years. All IOLs transmitted variable amounts of UV radiation. More data are required for further analysis on the subject.
Collapse
Affiliation(s)
| | - Dipankar Das
- Department of Ophthalmology, Sri Sankaradeva Nethralaya, Guwahati, Assam, India
| | | | | | - Henal Javeri
- Department of Ophthalmology, Sri Sankaradeva Nethralaya, Guwahati, Assam, India
| |
Collapse
|
2
|
Kanclerz P, Yildirim TM, Khoramnia R. Microscopic Characteristics of Late Intraocular Lens Opacifications. Arch Pathol Lab Med 2021; 145:759-767. [PMID: 33091924 DOI: 10.5858/arpa.2019-0626-ra] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2020] [Indexed: 11/06/2022]
Abstract
CONTEXT.— The increases in overall life expectancy and in lens surgeries performed on younger patients have resulted in a significant increase in the anticipated duration of artificial intraocular lenses (IOLs) in the eye. Thus, the physicochemical properties of the IOL become a critical issue, and several types of postoperative IOL opacifications have been reported. OBJECTIVE.— To describe the microscopic characteristics of opacified IOLs. Glistenings and subsurface nanoglistenings are fluid-related phenomena developing mainly in hydrophobic acrylic IOLs and are associated with aqueous influx into the IOL matrix. Calcification presents in hydrophilic acrylic or silicone IOLs as deposits of hydroxyapatite or other phases of calcium. Snowflake degeneration is less common, and it manifests in older polymethyl methacrylate IOLs. DATA SOURCES.— PubMed and ScienceDirect databases were searched for the following keywords: intraocular lens, IOL, cataract surgery, phacoemulsification, opacification, glistening, subsurface nanoglistenings, calcification, snowflake degeneration. English-language articles published up to October 15, 2019 were included in the study. The manuscript contains mainly a literature review; however, it was supplemented with original investigations from the David J. Apple International Laboratory for Ocular Pathology. CONCLUSIONS.— Glistenings and subsurface nanoglistenings should be evaluated in a hydrated state and at room temperature; they manifest as microvacuoles sized from 1.0 to greater than 25.0 μm and less than 200 nm, respectively. Calcification deposits are situated on or underneath the surface of the IOL and can be stained with a 1% alizarin red solution or with the von Kossa method. Snowflake degeneration manifests as "particles" or "crystals," causing whitish IOL discoloration. Scanning electron microscopy or energy dispersive X-ray spectroscopy may improve the diagnostic accuracy.
Collapse
Affiliation(s)
- Piotr Kanclerz
- From the Department of Ophthalmology, Hygeia Clinic, Gdańsk, Poland (Kanclerz)
| | - Timur Mert Yildirim
- The David J. Apple International Laboratory for Ocular Pathology, Department of Ophthalmology, University of Heidelberg, Germany (Yildirim, Khoramnia)
| | - Ramin Khoramnia
- The David J. Apple International Laboratory for Ocular Pathology, Department of Ophthalmology, University of Heidelberg, Germany (Yildirim, Khoramnia)
| |
Collapse
|
3
|
Durr GM, Ahmed IIK. Intraocular Lens Complications: Decentration, Uveitis-Glaucoma-Hyphema Syndrome, Opacification, and Refractive Surprises. Ophthalmology 2020; 128:e186-e194. [PMID: 32652203 DOI: 10.1016/j.ophtha.2020.07.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/27/2020] [Accepted: 07/06/2020] [Indexed: 02/06/2023] Open
Abstract
As cataract surgery has evolved, intraocular lens (IOL) complications are rare. The purpose of this review was to report the incidence, diagnosis, and management of IOL decentrations, uveitis-glaucoma-hyphema (UGH) syndrome, IOL opacifications, and refractive surprises. Literature review was performed by searching PubMed, MEDLINE, EMBASE, and the Cochrane Controlled Trial Database and the reference lists of original studies as well as reviews. Intraocular lens decentrations and dislocations can appear at any time, particularly in patients with predisposing factors such as pseudoexfoliation, prior vitreoretinal surgery, or trauma. Recognizing when they require surgical intervention for UGH or to improve visual function is critical in limiting long-term sequela. Intraocular lens opacifications such as glistenings rarely require intervention, but others, such as subsurface nanoglistenings, calcifications, or discolorations, may require IOL exchange. Finally, despite our best efforts to enhance measurements and IOL calculations, refractive surprises still occur. Intraocular lens complications are uncommon with modern cataract surgery. A number of these complications require proper identification and care to optimize patient outcomes.
Collapse
Affiliation(s)
- Georges M Durr
- Department of Ophthalmology, Université de Montréal, Montréal, Canada; Department of Ophthalmology, Centre Hospitalier de l'Université de Montréal, Montréal, Canada.
| | - Iqbal Ike K Ahmed
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Canada
| |
Collapse
|
4
|
Mid-term and long-term clinical assessments of a new 1-piece hydrophobic acrylic IOL with hydroxyethyl methacrylate. J Cataract Refract Surg 2020; 46:682-687. [DOI: 10.1097/j.jcrs.0000000000000142] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
5
|
Spiezio V, Walker BN, Calogero D, Ilev IK. Experimental and analytical quantification of light scattering from vacuoles in intraocular lenses. J Cataract Refract Surg 2020; 46:762-773. [PMID: 32358273 PMCID: PMC10824253 DOI: 10.1097/j.jcrs.0000000000000167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To develop an advanced test methodology for quantification of scattered light from intraocular lenses (IOLs) and to evaluate the correlation between IOL vacuole characteristics and measured scattered light. SETTING U.S. Food and Drug Administration, Optical Therapeutics and Medical Nanophotonics Laboratory, Silver Spring, Maryland, USA. DESIGN Experimental and analytical study. METHODS Twenty-four IOLs containing vacuoles were evaluated using a digital microscopy approach for identifying and characterizing the vacuoles present. A scanning light scattering profiler (SLSP) was used to evaluate and quantify the amount of scattered light from each IOL and from a 25th control IOL without any vacuoles. A variety of IOLs and vacuoles were also modeled in a Zemax simulation of the SLSP, and the simulated scattered light was modeled. RESULTS The scattered light as measured with SLSP was well correlated with vacuole characteristics, specifically density and size, as measured under the digital microscope for the 24 vacuole-containing IOLs. Additional correlations were found between vacuole sizes, orientations, and the angle at which light was scattered most severely. These correlations were also present in the Zemax model. CONCLUSIONS Vacuole optical characteristics can be well correlated with measured scatter, demonstrating an ability to predict scattered light based solely on microscope evaluation. Furthermore, the quantitative amount of scatter predicted with Zemax simulations trended closely with the experimentally measured trends.
Collapse
Affiliation(s)
- Vincent Spiezio
- From the Optical Therapeutics and Medical Nanophotonics Laboratory, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health (Spiezio, Ilev), and Office of Device Evaluation, Center for Devices and Radiological Health (Walker, Calogero), U.S. Food and Drug Administration, Silver Spring, Maryland, USA
| | | | | | | |
Collapse
|
6
|
Quantitative Multiparameter Evaluation of Vacuoles in Intraocular Lenses Employing a High-Magnification Digital Microscopy Method. J Ophthalmol 2019; 2019:7929014. [PMID: 31467695 PMCID: PMC6701293 DOI: 10.1155/2019/7929014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/23/2019] [Accepted: 07/09/2019] [Indexed: 11/17/2022] Open
Abstract
As small imperfections with micrometric sizes, fluid-filled vacuoles, also referred to as glistenings, in intraocular lenses (IOLs) have been known to induce significant unwanted light scattering that in several cases presumably cause complaints and sometimes lead to IOL explantation and replacement. This unwanted scatter is of particular concern for patients viewing bright light in reduced-light conditions such as when driving at night, as the scattered light toward the retina can cause temporary blindness. In this study, we have developed and implemented an accurate test methodology based on a high-magnification digital microscopy approach for quantitative multiparameter evaluation and classification of IOL vacuoles depending on their critical optical characteristics including vacuole size, density, shape, and orientation within the IOL material. Using the multiparameter database developed by evaluating vacuole characteristics, we established a classification grading system that can be used to evaluate vacuole effects on light scattering.
Collapse
|
7
|
Werner L, Thatthamla I, Ong M, Schatz H, Garcia-Gonzalez M, Gros-Otero J, Cañones-Zafra R, Teus MA. Evaluation of clarity characteristics in a new hydrophobic acrylic IOL in comparison to commercially available IOLs. J Cataract Refract Surg 2019; 45:1490-1497. [PMID: 31399323 DOI: 10.1016/j.jcrs.2019.05.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 04/26/2019] [Accepted: 05/11/2019] [Indexed: 11/26/2022]
Abstract
PURPOSE To perform in vitro assessments of surface haze and roughness, subsurface nanoglistenings (SSNGs), and glistenings of a new hydrophobic acrylic intraocular lens (IOL) in comparison to commercially available IOLs. SETTING Universities of Utah and Alcalá, and Alcon Vision, LLC. DESIGN Experimental study. METHODS The IOLs used were Clareon CNA0T0, Tecnis ZCB00 and Tecnis OptiBlue ZCB00V, Eternity W-60, enVista MX60, and Vivinex XY1. Surface haze was assessed by the pixel intensity units (PIU) from cross-sectional slitlamp images, and it was correlated to atomic force microscopy roughness. For SSNGs, the IOLs were artificially aged up to 10 years, followed by Scheimpflug densitometry (computer-compatible tape unit [CCTU]) measurements. For glistenings, the IOLs were immersed in a water bath and subjected to temperature changes before analysis. RESULTS The surface haze (n = 10, PIU) was 4.25 ± 0.87 (SD) (CNA0T0), 9.50 ± 1.66 (ZCB00), 39.48 ± 1.97 (ZCB00V), 46.68 ± 3.16 (W-60), 44.70 ± 4.00 (MX60), and 4.42 ± 0.71 (XY1) (P < .001), which showed a strong correlation with surface roughness measurements (R = 0.94, P = .006). The densitometry (n = 10, CCTU at 10 years) was 7.30 ± 1.36 (CNA0T0), 11.88 ± 3.10 (ZCB00), 38.12 ± 2.24 (ZCB00V), 48.13 ± 9.44 (W-60), 20.20 ± 3.84 (MX60), and 6.75 ± 6.66 (XY1) (P < .001), with no significant differences between CNA0T0 vs. ZCB00 and XY1. The glistenings density (n = 30) was the lowest for the CNA0T0, W-60, and MX60 IOLs. CONCLUSIONS The new Clareon CNA0T0, which is manufactured from a hydrophobic acrylic material, exhibited among the lowest levels of surface haze and roughness, SSNGs, and glistenings compared with other commercially available hydrophobic acrylic IOLs.
Collapse
Affiliation(s)
- Liliana Werner
- John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
| | | | - Marcia Ong
- Alcon Vision, LLC, Fort Worth, Texas, USA
| | | | | | | | | | - Miguel A Teus
- Clinica Novovisión, Madrid, Spain; Universidad de Alcalá, Madrid, Spain
| |
Collapse
|
8
|
In vivo evaluation of a new hydrophobic acrylic intraocular lens in the rabbit model. J Cataract Refract Surg 2018; 44:1497-1502. [PMID: 30228013 DOI: 10.1016/j.jcrs.2018.07.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/25/2018] [Accepted: 07/04/2018] [Indexed: 11/21/2022]
Abstract
PURPOSE To evaluate the uveal and capsular biocompatibility as well as positioning stability of a new hydrophobic acrylic intraocular lens (IOL) in vivo in the rabbit model and compare it with a commercially available IOL. SETTING John A Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN Experimental study. METHODS Fifteen New Zealand rabbits had the new test IOL (Clareon CNA0T0) implanted in one eye and a control IOL (Acrysof SN60WF) implanted in the contralateral eye. The test IOL is manufactured from a new hydrophobic acrylic material incorporating ultraviolet blocker and blue light filter. Its design is based on the control IOL's platform. The rabbits were followed up with weekly slitlamp evaluations, which assessed inflammatory reactions as well as capsular bag opacification. Anterior chamber depth was measured at 1 and 4 weeks post-implantation (high-frequency ultrasound). After 4 weeks, the rabbits were killed humanely and the eyes were enucleated. The anterior segment was evaluated from the posterior or Miyake-Apple view, and was then processed for complete histopathology. RESULTS There were no statistically significant differences between test and control eyes in terms of postoperative inflammation and capsular biocompatibility, including posterior capsule opacification (P = .34, paired t test), and anterior capsule opacification (P = .53, paired t test), as observed during clinical and pathological evaluation. In vivo axial positioning for the test IOL was comparable to the control IOL and stable over time (P = .531 versus P = .788). CONCLUSIONS The new IOL showed biocompatibility and stability comparable to the control IOL.
Collapse
|
9
|
Nguyen J, Werner L, Ludlow J, Aliancy J, Ha L, Masino B, Enright S, Alley RK, Sahler R. Intraocular lens power adjustment by a femtosecond laser: In vitro evaluation of power change, modulation transfer function, light transmission, and light scattering in a blue light-filtering lens. J Cataract Refract Surg 2018. [PMID: 29525614 DOI: 10.1016/j.jcrs.2017.09.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE To evaluate intraocular lens (IOL) power, modulation transfer function (MTF), light transmission, and light scattering of a blue light-filtering IOL before and after power adjustment by a femtosecond laser obtained through increased hydrophilicity of targeted areas within the optic, creating the ability to build a refractive-index-shaping lens within an existing IOL. SETTING John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA. DESIGN Experimental study. METHODS Ten CT Lucia 601PY single-piece yellow hydrophobic acrylic IOLs were used in this study. The IOL power and MTF were measured with a power and modulation transfer function device. Light transmission was measured using a Lambda 35 UV-VIS spectrophotometer. Backlight scattering was assessed with a Scheimpflug camera within the IOL substance. All measurements were done with hydrated IOLs. The IOLs were also evaluated under light microscopy (LM) before and after laser adjustment. RESULTS After laser adjustment, a mean power change of -2.037 diopters was associated with a MTF change of -0.064 and a light transmittance change of -1.4%. Backlight scattering increased within the IOL optic in the zone corresponding to the laser treatment at levels that are not expected to be clinically significant. Treated areas within the optic could be well appreciated under LM without damage to the IOLs. CONCLUSION Power adjustment of a commercially available hydrophobic acrylic blue light-filtering IOL by a femtosecond laser produced an accurate change in dioptric power while not significantly affecting the quality of the IOL.
Collapse
Affiliation(s)
- Jason Nguyen
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Liliana Werner
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA.
| | - Jason Ludlow
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Joah Aliancy
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Larry Ha
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Bryan Masino
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Sean Enright
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Ray K Alley
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| | - Ruth Sahler
- From the Department of Ophthalmology and Visual Sciences (Nguyen, Werner, Ludlow, Aliancy, Ha, Masino), John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, and Perfect Lens LLC (Enright, Alley, Sahler), Irvine, California, USA
| |
Collapse
|
10
|
Oshika T, Ando H, Inoue Y, Eguchi S, Sato Y, Sugita T, Nishimura T, Hayashi K, Fujita Y, Miyata A, Sasaki N, Miyata K. Influence of surface light scattering and glistenings of intraocular lenses on visual function 15 to 20 years after surgery. J Cataract Refract Surg 2018; 44:219-225. [DOI: 10.1016/j.jcrs.2017.12.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 11/29/2017] [Accepted: 12/03/2017] [Indexed: 11/16/2022]
|
11
|
Tortolano L, Saunier J, Hammami S, Manerlax K, Matmati H, Do B, Jubeli E, Fattal E, Yagoubi N. Restructuration kinetics of amphiphilic intraocular lenses during aging. Colloids Surf B Biointerfaces 2018; 161:420-432. [PMID: 29121615 DOI: 10.1016/j.colsurfb.2017.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/11/2017] [Accepted: 11/02/2017] [Indexed: 12/11/2022]
|
12
|
Shiraya T, Kato S, Minami K, Miyata K. Influence of surface light scattering in hydrophobic acrylic intraocular lenses on laser beam transmittance. Int Ophthalmol 2016; 37:251-255. [PMID: 27221266 DOI: 10.1007/s10792-016-0256-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 05/12/2016] [Indexed: 10/21/2022]
Abstract
The aim of this study was to experimentally examine the changes in the transmittances of photocoagulation lasers when surface light scattering increases in AcrySof intraocular lenses (IOLs). SA60AT IOLs (Alcon) were acceleratingly aging for 0, 3, 5, and 10 years to simulate surface light scattering, and the surface light-scattering intensities of both IOL surfaces were measured using a Scheimpflug photographer. The powers of laser beams that passed from a laser photocoagulator through the aged IOLs were measured at 532, 577, and 647 nm. Changes in the laser power and transmittance with the years of aging and the intensities of surface light scattering were examined. Although the intensity of surface light scattering increased with the years of aging, the laser power did not change with the years of aging (P > 0.30, Kruskal-Wallis test). There were no significant changes in the laser transmittance with the years of aging or the laser wavelength (P > 0.30 and 0.57, respectively). The intensity of surface light scattering revealed no significant association with the laser transmittance at any wavelength (P > 0.37, liner regression). The increases in the surface light scattering of the AcrySof IOLs would not influence retinal photocoagulation treatments for up to 10 years after implantation.
Collapse
Affiliation(s)
- Tomoyasu Shiraya
- Department of Ophthalmology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Satoshi Kato
- Department of Ophthalmology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | | | - Kazunori Miyata
- Department of Ophthalmology, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.,Miyata Eye Hospital, Miyakonojo, Miyazaki, Japan
| |
Collapse
|
13
|
Werner L, Stover JC, Schwiegerling J, Das KK. Light scattering, straylight, and optical quality in hydrophobic acrylic intraocular lenses with subsurface nanoglistenings. J Cataract Refract Surg 2016; 42:148-56. [DOI: 10.1016/j.jcrs.2015.07.043] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/15/2015] [Accepted: 07/22/2015] [Indexed: 11/28/2022]
|
14
|
Matsushima H, Nagata M, Katsuki Y, Ota I, Miyake K, Beiko GHH, Grzybowski A. Decreased visual acuity resulting from glistening and sub-surface nano-glistening formation in intraocular lenses: A retrospective analysis of 5 cases. Saudi J Ophthalmol 2015; 29:259-63. [PMID: 26586975 PMCID: PMC4625192 DOI: 10.1016/j.sjopt.2015.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2014] [Revised: 05/14/2015] [Accepted: 07/23/2015] [Indexed: 11/25/2022] Open
Abstract
Background To report on five patients with decreased visual acuity due to glistening and severe sub-surface nano-glistening (SSNG) formation within their intraocular lenses (IOLs). Design Case reports and analysis of extracted IOLs. Participants and samples We report improved visual acuity when IOLs with severe glistening and SSNG were exchanged for clear IOLs in five patients. Methods Case reports. Main outcome measures The main outcome measure was visual acuity. The secondary outcome measure was light transmission. Explanted IOLs were subjected to investigation. Pre- and postoperative slit lamp images of the anterior eye and microscopic images of the extracted IOLs were taken and compared. Light transmission of the IOL was measured using a double beam type spectrophotometer. An integrated value of the percentage light transmittance in the visible light spectrum was calculated. Results We report on five patients whose visual acuity improved when IOLs were exchanged because of severe glistening and SSNG. All of the affected IOLs were MA60BM (Alcon, Forth Wroth Texas, USA) and the original implantation had occurred over a range of 6–15 years prior to the IOL exchange. Light transmission was decreased in all affected lenses compared to a similar control IOL. Conclusions Although only a few reports of cases in which glistening and SSNG have progressed to the level of decreased visual function have been published, the likelihood is that this phenomena will increase as the severity and incidence of these inclusions have been shown to increase with time. Appropriate evaluations of visual function in such patients are needed and consideration should be given to IOL exchange in symptomatic patients.
Collapse
Affiliation(s)
| | - Mayumi Nagata
- Department of Ophthalmology, Dokkyo Medical University, Tochigi, Japan
| | - Yoko Katsuki
- Department of Ophthalmology, Dokkyo Medical University, Tochigi, Japan
| | - Ichiro Ota
- Shohzankai Medical Foundation, Miyake Eye Hospital, Nagoya, Japan
| | - Kensaku Miyake
- Shohzankai Medical Foundation, Miyake Eye Hospital, Nagoya, Japan
| | - George H H Beiko
- Department of Surgery, McMaster University, Canada ; Department of Visual Science, University of Toronto, Canada
| | - Andrzej Grzybowski
- Department of Ophthalmology, Poznan City Hospital, Poznan, Poland ; Department of Ophthalmology, University of Warmia and Mazury, Olsztyn, Poland
| |
Collapse
|
15
|
Artigas JM, Felipe A, Navea A, García-Domene MC, Pons Á, Mataix J. Determination of scattering in intraocular lenses by spectrophotometric measurements. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:127006. [PMID: 25539187 DOI: 10.1117/1.jbo.19.12.127006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 11/21/2014] [Indexed: 06/04/2023]
Abstract
This study presents a method for measuring scattering in explanted intraocular lenses (IOLs). Currently, determining scattering in IOLs is usually performed by Scheimpflug cameras and the results are expressed in the units used by this apparatus. The method we propose uses a spectrophotometer and this makes it possible to measure the total transmission of the IOL by using an integrating sphere; the direct transmission is determined by the double-beam mode. The difference between these two transmissions gives a value of the scattering in percentage values of light lost. In addition, by obtaining the spectral transmission curve, information about the most scattered wavelengths is also obtained. The IOL power introduces errors when directly measured, particularly with high powers. This problem can be overcome if a tailor-made cuvette is used that shortens the distance between the IOL and the condensing lens of the spectrophotometer when the IOL powers are below 24 diopters. We checked the effectiveness of this method by measuring the scattering of three explanted IOLs from cornea donors. This method, however, does not make it possible to ascertain whether the scattering measured is caused by surface light scattering or internal light scattering.
Collapse
Affiliation(s)
- José M Artigas
- Universidad de Valencia, Faculty of Physics, Optics Department, C/Dr. Moliner, 50 E46100, Burjassot, Valencia, SpainbFisabio Oftalmología Médica (FOM), Bifurcación Pío Baroja-General Avilés, s/n E46015-Valencia, Spain
| | - Adelina Felipe
- Universidad de Valencia, Faculty of Physics, Optics Department, C/Dr. Moliner, 50 E46100, Burjassot, Valencia, SpainbFisabio Oftalmología Médica (FOM), Bifurcación Pío Baroja-General Avilés, s/n E46015-Valencia, Spain
| | - Amparo Navea
- Fisabio Oftalmología Médica (FOM), Bifurcación Pío Baroja-General Avilés, s/n E46015-Valencia, Spain
| | - M Carmen García-Domene
- Universidad de Valencia, Faculty of Physics, Optics Department, C/Dr. Moliner, 50 E46100, Burjassot, Valencia, SpainbFisabio Oftalmología Médica (FOM), Bifurcación Pío Baroja-General Avilés, s/n E46015-Valencia, Spain
| | - Álvaro Pons
- Universidad de Valencia, Faculty of Physics, Optics Department, C/Dr. Moliner, 50 E46100, Burjassot, Valencia, Spain
| | - Jorge Mataix
- Fisabio Oftalmología Médica (FOM), Bifurcación Pío Baroja-General Avilés, s/n E46015-Valencia, Spain
| |
Collapse
|