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Lafetá Queiroz RF, Kniggendorf DV, de Medeiros AL, Hida WT, Nakano CT, Carricondo PC, Nosé W, Rolim AG, Motta AFP. Clinical comparison of speculum's influence on intraoperative aberrometry reading. Clin Ophthalmol 2019; 13:953-958. [PMID: 31289436 PMCID: PMC6560926 DOI: 10.2147/opth.s177992] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose The aim of this study was to evaluate the influence of four different types of speculums on aberrometry reading (OPD SCAN III [OPD]) and on intraoperative aberrometry reading (optiwave response analyzer, ORA). Patients and methods This prospective, controlled, comparative study of consecutive cases included the evaluation of five eyes of five patients with monofocal intraocular lens (IOL) implantation. Seventeen measures were performed on each patient: for each speculum, there were two measurements on the OPD and another two on ORA with four different types of blepharostats. A control measure was performed on the without blepharostat in the dominant eye of each patient, therefore totalizing 85 measurements. The measures with the blepharostats were as follows: without pressure (WF) or passive measure and after pressure (AF) or active measure to close the eye. The speculum used in all patients was as follows: open-edged wire (Barraquer); threaded with open blade (Lieberman), with 21 mm aperture; wired with solid blade (Barraquer); and threaded with solid blade (Lieberman) with 21 mm opening. An evaluation of the objective refractive data from the OPD and ORA and the corneal astigmatism from the OPD was performed. Results Spherical equivalent (SE) of the OPD with the use of blepharostat compared to the OPD without speculum presented only 37.5% of results without statistical significance. Regarding the SE of ORA with speculum usage, compared to the OPD without blepharostat, only 12.5% were not significant. Regarding the accuracy of the ORA refractive axis with the use of blepharostats, all results presented statistical significance. Conclusion Thus, in the present study, we reached the conclusion between the studied blepharostats that the most suitable for use in the aphakic and pseudophakic capture of the ORA is the open blade threaded blepharostat (Lieberman).
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Affiliation(s)
- Rodrigo Franco Lafetá Queiroz
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil,
| | - Danilo Varela Kniggendorf
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil,
| | - André Lins de Medeiros
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil,
| | - Wilson Takashi Hida
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil, .,Universidade de São Paulo, SP, Brazil.,Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Celso Takashi Nakano
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil,
| | | | - Walton Nosé
- Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Andre Gustavo Rolim
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil,
| | - Antonio Francisco Pimenta Motta
- Hospital Oftalmológico de Brasília, Brasília, DF, Brazil, .,Centro de Estudos Oftalmológicos Renato Ambrósio, Brasília, DF, Brazil,
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Kovalev MS, Krasin GK, Odinokov SB, Solomashenko AB, Zlokazov EY. Measurement of wavefront curvature using computer-generated holograms. OPTICS EXPRESS 2019; 27:1563-1568. [PMID: 30696220 DOI: 10.1364/oe.27.001563] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
The present article is dedicated to the problem of computer-generated holograms application for measurement of optical wavefront curvature with high precision. A holographic wavefront sensor scheme based on a phase-only spatial light modulator, which is used for CGH displaying, is proposed. The presented optical scheme and processing algorithm are validated with numerical simulations and experimental modelling.
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