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Retinal sensitivity in healthy Indians using microperimeter.

Laxmi Gella, Muneeswar Gupta Nittala, Rajiv Raman1

  • 1Shri Bhagwan Mahavir Vitreoretinal Services, Sankara Nethralaya, Chennai, Tamil Nadu, India.

Indian Journal of Ophthalmology
|April 27, 2013
PubMed
Summary

This study establishes normative retinal sensitivity values in healthy Indians using microperimetry. Mean sensitivity was 18.26 dB, with higher values in males and a slight age-related decline.

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Area of Science:

  • Ophthalmology
  • Visual Neuroscience

Background:

  • Assessing retinal sensitivity is crucial for diagnosing visual impairments.
  • Establishing normative data is essential for accurate clinical interpretation.

Purpose of the Study:

  • To determine reference retinal sensitivity values in a healthy Indian population.
  • To evaluate the utility of microperimetry in assessing visual function.

Main Methods:

  • A prospective study involving 144 healthy Indian volunteers.
  • Comprehensive ophthalmic examination including contrast sensitivity testing.
  • Microperimetry in the central 20° macula with 76 stimulus points.

Main Results:

  • Mean retinal sensitivity was 18.26 ± 0.99 dB.

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  • Males exhibited significantly higher retinal sensitivity (P = 0.03).
  • A 0.04 dB/year age-related decline in sensitivity was observed; contrast sensitivity correlated with retinal sensitivity (r = 0.432).

    • Conclusions:

    • Microperimetry is effective for evaluating retinal sensitivity and fixation.
    • The established normative values provide a benchmark for diagnosing retinal pathologies.