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Li G, Ho M, Li S, Chen L, Iu L, Cheung CY, Brelen M, Young AL. COMPARING FUNCTIONAL AND VASCULAR LAYER OUTCOMES OF LASER PHOTOCOAGULATION VERSUS SUBTHRESHOLD MICROPULSE LASER FOR DIABETIC MACULAR EDEMA: An OCT-Angiography Study. Retina 2023; 43:823-831. [PMID: 36728901 DOI: 10.1097/iae.0000000000003711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/01/2022] [Indexed: 02/03/2023]
Abstract
PURPOSE To compare the efficacy of conventional laser and subthreshold micropulse laser (SML) in treating diabetic macular edema in terms of functional outcomes and changes in quantitative metrics for the retinal capillary and choriocapillary vascular layers. METHODS Fifty-two eyes from 52 patients with treatment-naive, clinically significant macular edema were randomly assigned to the conventional laser group or SML group in a 1:1 ratio. Best-corrected visual acuity, central macular thickness (CMT), and optical coherence tomography angiography scans were measured at baseline, 1, 3, and 6 months after treatment. RESULTS The SML group showed rapid visual recovery, improving from baseline of 0.320 ± 0.31 logarithm of the minimum angle of resolution (20/42 Snellen) to 0.270 ± 0.22 logarithm of the minimum angle of resolution (20/37 Snellen) at 1 month ( P = 0.038) and had significant improvements in CMT at 6-month post-treatment (353.88-301.00 µ m, P = 0.005). Statistically significant changes were detected across all optical coherence tomography angiography metrics, including vessel density, vessel length density, vessel diameter index, and fractal dimension, at 6 months for both groups in the deep capillary plexus and choriocapillary plexus. CONCLUSION Subthreshold micropulse laser resulted in early visual recovery and sustained macular thickness improvement in the treatment of diabetic macular edema. Microvascular perfusion parameters, including vessel density, vessel length density, and fractal dimension, improved in the deep capillary plexus and choriocapillary plexus for both treatment groups at 6 months post-treatment.
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Affiliation(s)
- Gabriel Li
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Mary Ho
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Sophia Li
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lijia Chen
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lawrence Iu
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Carol Y Cheung
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Marten Brelen
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Alvin L Young
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China; and
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
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Tsui J, Ho M, Lui G, Li T, Chen L, Iu L, Brelen M, Young AL. The clinical presentation and treatment outcomes of ocular tuberculosis: a 5-year experience in an endemic area. Int Ophthalmol 2021; 41:3199-3209. [PMID: 34037904 DOI: 10.1007/s10792-021-01886-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 05/12/2021] [Indexed: 11/30/2022]
Abstract
PURPOSE To report the clinical presentations of ocular tuberculosis infection (OTB) and the treatment regimen and outcome in an endemic area. METHODS This is a retrospective case series of patients with presumed OTB treated in a tertiary teaching hospital in Hong Kong in 2014-2019. RESULTS Among the nineteen patients recruited, the most common clinical presentation of OTB was retinal vasculitis (42.1%), followed by scleritis, intermediate uveitis, and choroidal tuberculoma (15.8% respectively). 94.7% and 94.4% of the subjects were treated with ATT and steroid, respectively, and 31.6% were put on systemic immunosuppressant prior to the initiation of ATT. Apart from those suffering from intermediate uveitis, most demonstrated good clinical response within 8 weeks of ATT initiation. CONCLUSION Ocular involvement of TB has been increasingly recognized, especially in endemic regions like Hong Kong. High index of suspicion is recommended for OTB in typical clinical phenotypes or recurrent/resistant ocular inflammation unresponsive to conventional therapy. TB retinal vasculitis was the most common presentation of OTB in this study and OTB generally requires treatment with either regional or systemic steroid together with ATT.
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Affiliation(s)
- Jolly Tsui
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital and Alice Ho Miu Ling Nethersole, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Mary Ho
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital and Alice Ho Miu Ling Nethersole, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Grace Lui
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Timothy Li
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lijia Chen
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital and Alice Ho Miu Ling Nethersole, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Lawrence Iu
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital and Alice Ho Miu Ling Nethersole, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Marten Brelen
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital and Alice Ho Miu Ling Nethersole, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Alvin L Young
- Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital and Alice Ho Miu Ling Nethersole, The Chinese University of Hong Kong, Hong Kong SAR, China.
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Lau T, Wong IY, Iu L, Chhablani J, Yong T, Hideki K, Lee J, Wong R. En-face optical coherence tomography in the diagnosis and management of age-related macular degeneration and polypoidal choroidal vasculopathy. Indian J Ophthalmol 2016; 63:378-83. [PMID: 26139796 PMCID: PMC4501131 DOI: 10.4103/0301-4738.159860] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Optical coherence tomography (OCT) is a noninvasive imaging modality providing high-resolution images of the central retina that has completely transformed the field of ophthalmology. While traditional OCT has produced longitudinal cross-sectional images, advancements in data processing have led to the development of en-face OCT, which produces transverse images of retinal and choroidal layers at any specified depth. This offers additional benefit on top of longitudinal cross-sections because it provides an extensive overview of pathological structures in a single image. The aim of this review was to discuss the utility of en-face OCT in the diagnosis and management of age-related macular degeneration (AMD) and polypoidal choroidal vasculopathy (PCV). En-face imaging of the inner segment/outer segment junction of retinal photoreceptors has been shown to be a useful indicator of visual acuity and a predictor of the extent of progression of geographic atrophy. En-face OCT has also enabled high-resolution analysis and quantification of pathological structures such as reticular pseudodrusen (RPD) and choroidal neovascularization, which have the potential to become useful markers for disease monitoring. En-face Doppler OCT enables subtle changes in the choroidal vasculature to be detected in eyes with RPD and AMD, which has significantly advanced our understanding of their pathogenesis. En-face Doppler OCT has also been shown to be useful for detecting the polypoid lesions and branching vascular networks diagnostic of PCV. It may therefore serve as a noninvasive alternative to fluorescein and indocyanine green angiography for the diagnosis of PCV and other forms of the exudative macular disease.
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Affiliation(s)
| | - Ian Y Wong
- The Department of Ophthalmology, The University of Hong Kong,, Hong Kong, China
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