Retinal sensitivity in healthy Indians using microperimeter.
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Date
2014-03
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Abstract
Aims: To establish the retinal sensitivity values in healthy Indians using microperimeter.
Materials and Methods: In this prospective study, 144 healthy volunteers were included. All the participants
underwent a comprehensive ophthalmic examination including contrast sensitivity. Microperimetry was
performed in the central 20° of the macula using 76 stimulus points to assess the retinal sensitivity, and the
fixation characteristics in the study population were assessed. Results: The mean age of the study sample
was 43.08 ± 10.85 years (range: 25‑69). Mean retinal sensitivity was 18.26 ± 0.99 dB. Males had significantly
increased retinal sensitivity (18.34 vs. 18.17 dB, P = 0.03). The linear regression analysis revealed a 0.04 dB
per year age‑related decline in mean retinal sensitivity. Contrast sensitivity was significantly correlated
with the mean retinal sensitivity (r = 0.432, P < 0.001). Fixation stability in the central 2° and 4° were
69% and 89%, respectively. Conclusion: Microperimeter is an ideal tool to assess the retinal sensitivity and
the fixation behavior. These normative values could help in drawing a meaningful conclusion in various
retinal pathologies.
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Keywords
Contrast sensitivity, fixation, microperimeter, normative data, retinal sensitivity
Citation
Gella Laxmi, Gupta Nittala Muneeswar, Raman Rajiv. Retinal sensitivity in healthy Indians using microperimeter. Indian Journal of Ophthalmology. 2014 Mar ; 62 (3): 284-286.