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Seeing invisible light: 2-photon microperimetry to measure visual function
- Source :
- American Journal of Ophthalmology Case Reports, Vol 28, Iss , Pp 101724- (2022)
- Publication Year :
- 2022
- Publisher :
- Elsevier, 2022.
-
Abstract
- Purpose: The accuracy of conventional visual function tests, which emit visible light, decreases in patients with corneal scars, cataracts, and vitreous hemorrhages. In contrast, infrared (IR) light exhibits greater tissue penetrance than visible light and is less susceptible to optical opacities. We therefore compared conventional visual function tests against infrared 2-phton microperimetry (2PM-IR) in a subject with a brunescent nuclear sclerotic and posterior subcapsular cataract before and after cataract surgery. Methods: Testing using infrared light microperimetry from a novel device (2PM-IR), visible light microperimetry from a novel device (2PM-Vis), conventional microperimetry, and the cone contrast threshold (CCT) test were performed before and after cataract surgery. Results: Retinal sensitivity assessed using 2PM-IR, 2PM-Vis, and cMP improved by 3.4 dB, 17.4 dB, and 18 dB, respectively. Cone contrast threshold testing improved for the S-cone, M-cone, and l-cone by 111, 14, and 30. Conclusions and Importance: 2PM-IR, unlike conventional visual function tests, showed minimal variability in retinal sensitivity before and after surgery. Thus, IR visual stimulation may provide a more accurate means of measuring neurosensory retinal function by circumventing optical media opacities, aiding in the diagnosis of early macular disease.
- Subjects :
- Two-photon microperimetry
cataracts
Visual sensitivity
Ophthalmology
RE1-994
Subjects
Details
- Language :
- English
- ISSN :
- 24519936
- Volume :
- 28
- Issue :
- 101724-
- Database :
- Directory of Open Access Journals
- Journal :
- American Journal of Ophthalmology Case Reports
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.73619d3a3947d38ff2a6915f766c10
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.ajoc.2022.101724