Two-Color Dark-Adapted Perimetry Implemented With a Commercially Available Perimeter to Characterize Rod-Pathway Sensitivity
| Autor: | Igelman, Austin D., Park, Jason C., Hyde, Robert A., Everett, Lesley, Yang, Paul, Pennesi, Mark E., McAnany, J. Jason |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Ophthalmic Surg Lasers Imaging Retina |
| ISSN: | 2325-8179 2325-8160 |
| DOI: | 10.3928/23258160-20221118-03 |
| Popis: | Background and Objective: To characterize rod-pathway function across the visual field using 2-color dark-adapted perimetry (2cDAP) implemented with conventional Octopus 900 Pro perimeters. Patients and Methods: Eighteen visually normal individuals and two retinitis pigmentosa (RP) patients participated. Thresholds were measured under dark-adapted conditions at 15 locations along the horizontal meridian using short (450 nm) and long (610 nm) wavelength stimuli. Threshold differences between the two wavelengths were used to determine rod- vs cone-mediated function. Results: Among controls, peripheral and perifoveal thresholds for the short-wavelength stimulus were approximately 2 log units lower than for the long-wavelength stimulus. Foveal thresholds for the two wavelengths were similar. RP threshold profiles differed considerably from the controls, with normal foveal thresholds and high peripheral thresholds for both wavelengths. Conclusions: 2cDAP can be performed with an unmodified Octopus perimeter to evaluate rod function across the visual field and obtain information that is not available with standard automated perimetry. [ Ophthalmic Surg Lasers Imaging Retina 2022;53:692–696.] |
| Databáze: | OpenAIRE |
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