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Sodhi PK, Gautam A, Sharma N, Anand K, Sodhi RS. Role of improved distance and near visual acuity with low vision aids to enhance stereopsis in retinal diseases. Indian J Ophthalmol 2021; 69:1867-1871. [PMID: 34146046 PMCID: PMC8374828 DOI: 10.4103/ijo.ijo_3154_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Purpose: The purpose of this study was to examine role of improved distance and near best-corrected visual acuity (DBCVA and NBCVA) with use of magnification devices to enhance stereopsis in low vision (LV) subjects having retinal diseases. Methods: In a cross-sectional observational study without control, 84 subjects having LV due to retinal diseases were examined for an improvement of BCVA with use of magnifying low vision aids (LVAs) (2X for DBCVA and 3X for NBCVA). The stereopsis scores on titmus fly test were recorded with near refractive correction “on” and then with 3X magnification. The improvement in stereopsis for distance was however estimated through statistical correlation values. Results: The DBCVA (P < 0.001), NBCVA (P < 0.001) and stereopsis (P < 0.001) improved statistically significantly (SS) following magnifying LVA. There was no correlation between pre-LVA stereopsis and pre-LVA DBCVA (r = 0.059; P = 0.444;NSS) and post-LVA DBCVA (r = 0.054; P = 0.487;NSS); and no correlation between post-LVA stereopsis and pre-LVA DBCVA (r = 0.042; P = 0.592;NSS) and post-LVA DBCVA (r = 0.08; P = 0.920;NSS). There was no correlation between pre-LVA stereopsis and pre-LVA NBCVA (r = 0.044; P = 0.572;NSS) and no correlation between post-LVA stereopsis and pre-LVA NBCVA (r = 0.108; P = 0.165;NSS). But positive correlation between pre-LVA stereopsis and post-LVA NBCVA (r = 0.347; P < 0.001) and between post-LVA stereopsis and post-LVA NBCVA (r = 0.445; P < 0.001) was SS. Conclusion: The use of magnification as LVA improves both the BCVA and stereopsis. The increase in DBCVA with LVA improves the stereopsis for distance though it may not be SS while improvement in NBCVA with LVA enhances stereopsis for near objects in SS manner.
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Affiliation(s)
| | - Akanksha Gautam
- Guru Nanak Eye Centre & Maulana Azad Medical College, New Delhi, India
| | - Nandini Sharma
- Department of Community Medicine, Maulana Azad Medical College, New Delhi, India
| | - Kamlesh Anand
- Guru Nanak Eye Centre & Maulana Azad Medical College, New Delhi, India
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Tong J, Huang J, Khou V, Martin J, Kalloniatis M, Ly A. Topical Review: Assessment of Binocular Sensory Processes in Low Vision. Optom Vis Sci 2021; 98:310-325. [PMID: 33828038 PMCID: PMC8051935 DOI: 10.1097/opx.0000000000001672] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 12/22/2020] [Indexed: 11/26/2022] Open
Abstract
SIGNIFICANCE This article summarizes the evidence for a higher prevalence of binocular vision dysfunctions in individuals with vision impairment. Assessment for and identification of binocular vision dysfunctions can detect individuals experiencing difficulties in activities including reading, object placement tasks, and mobility.Comprehensive vision assessment in low vision populations is necessary to identify the extent of remaining vision and to enable directed rehabilitation efforts. In patients with vision impairment, little attention is typically paid to assessments of binocular vision, including ocular vergence, stereopsis, and binocular summation characteristics. In addition, binocular measurements of threshold automated visual fields are not routinely performed in clinical practice, leading to an incomplete understanding of individuals' binocular visual field and may affect rehabilitation outcomes.First, this review summarizes the prevalence of dysfunctions in ocular vergence, stereopsis, and binocular summation characteristics across a variety of ocular pathologies causing vision impairment. Second, this review examines the links between clinical measurements of binocular visual functions and outcome measures including quality of life and performance in functional tasks. There is an increased prevalence of dysfunctions in ocular alignment, stereopsis, and binocular summation across low vision cohorts compared with those with normal vision. The identification of binocular vision dysfunctions during routine low vision assessments is especially important in patients experiencing difficulties in activities of daily living, including but not limited to reading, object placement tasks, and mobility. However, further research is required to determine whether addressing the identified deficits in binocular vision in low vision rehabilitative efforts directly impacts patient outcomes.
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Affiliation(s)
- Janelle Tong
- Centre for Eye Health, University of New South Wales, Sydney, New South Wales, Australia
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Jessie Huang
- Centre for Eye Health, University of New South Wales, Sydney, New South Wales, Australia
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Vincent Khou
- Centre for Eye Health, University of New South Wales, Sydney, New South Wales, Australia
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Jodi Martin
- Guide Dogs New South Wales/Australian Capital Territory, Sydney, New South Wales, Australia
| | - Michael Kalloniatis
- Centre for Eye Health, University of New South Wales, Sydney, New South Wales, Australia
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
| | - Angelica Ly
- Centre for Eye Health, University of New South Wales, Sydney, New South Wales, Australia
- School of Optometry and Vision Science, University of New South Wales, Sydney, New South Wales, Australia
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Mastropasqua R, D’Aloisio R, De Nicola C, Ferro G, Senatore A, Libertini D, Di Marzio G, Di Nicola M, Di Martino G, Di Antonio L, Toto L. Widefield Swept Source OCTA in Retinitis Pigmentosa. Diagnostics (Basel) 2020; 10:diagnostics10010050. [PMID: 31963847 PMCID: PMC7167867 DOI: 10.3390/diagnostics10010050] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 12/12/2022] Open
Abstract
(1) Background: To evaluate superficial capillary plexus (SCP), deep capillary plexus (DCP), choriocapillaris (CC), perfusion density (PD), and vessel length density (VLD) in macular and near/mid periphery regions in patients with retinitis pigmentosa (RP) using widefield swept source optical coherence tomography angiography (WSS-OCTA). (2) Methods: Twelve RP patients (20 eyes) and 20 age-matched subjects (20 eyes) were imaged with the SS-OCTA system (PLEX Elite 9000, Carl Zeiss Meditec Inc., Dublin, CA, USA). Quantitative analysis was performed in the macular and peripheral regions. The main outcome measures were SCP, DCP, CC, PD, and VLD in central and peripheral areas. (3) Results: Mean visual acuity, central macular thickness, and microperimetry were significantly reduced in RP patients compared to normal subjects (p < 0.05). The perfusion density and VLD of SCP, DCP, and CC were significantly reduced in RP patients compared to normal controls both in the central and peripheral retina (p < 0.05). A significant direct correlation was found in RP patients between PD of the 1.5 mm central retina both in DCP and CC and microperimetry at 4° and 8°. (4) Conclusions: Widefield SS-OCTA shows an impairment of retinal and choroidal perfusion density and vessel length density in central and peripheral retina of RP patients. The reduction of flow features correlates with the macular function.
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Affiliation(s)
- Rodolfo Mastropasqua
- Institute of Ophthalmology, University of Modena and Reggio Emilia, Via Università, 4, 41121 Modena (MO), Italy;
| | - Rossella D’Aloisio
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
- Correspondence: ; Tel.: +39-0871358410
| | - Chiara De Nicola
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
| | - Giada Ferro
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
| | - Alfonso Senatore
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
- Duke University Eye Center, Center for Retinal Degenerations and Ophthalmic Genetic Diseases, Durham, NC 27705, USA
| | - Daniele Libertini
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
| | - Guido Di Marzio
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
| | - Marta Di Nicola
- Laboratory of Biostatistics, Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Italy;
| | - Giuseppe Di Martino
- Department of Medicine and Science of Ageing, School of Hygiene and Preventive Medicine, University G. D’Annunzio Chieti-Pescara, via dei Vestini 31, 66100 Chieti, Italy;
| | - Luca Di Antonio
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
| | - Lisa Toto
- Ophthalmology Clinic, Department of Medicine and Science of Ageing, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy; (C.D.N.); (G.F.); (A.S.); (D.L.); (G.D.M.); (L.D.A.); (L.T.)
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