Normative data for macular perimetry using the MP-3 microperimeter in healthy individuals

Area of Science:

• Ophthalmology
• Visual Neuroscience

Background:

• Microperimetry is vital for assessing visual function in retinal diseases.
• Establishing normal microperimetry values with the MP-3 is essential for accurate impairment assessment.
• Baseline data for macular sensitivity, age, and sex correlations are needed.

Purpose of the Study:

• Determine normal light sensitivity thresholds using the MP-3 microperimeter in healthy individuals.
• Assess fixation stability during microperimetry with the MP-3.
• Correlate microperimetry values with age and sex.

Main Methods:

• Full-threshold microperimetry with a 4-2 staircase strategy was performed on 37 healthy volunteers (age 28-68).
• Standard Goldmann III stimulus size and 68 test points (similar to Humphrey Field Analyzer 10-2) were used.
• Fixation stability was recorded simultaneously, and age-related sensitivity decline was analyzed via linear regression.

Main Results:

• Global mean sensitivity was 29.01 ± 1.44 dB.
• Mean central sensitivity at 2° was 28.5 ± 1.77 dB (OD) and 28.75 ± 1.98 dB (OS).
• Median fixation stability within 2° and 4° was 80% and 96%, respectively. A decline in global sensitivity with age was observed.

Conclusions:

• MP-3 microperimetry provides accurate, topography-specific retinal sensitivity testing.
• This study offers a normal, age-matched database for MP-3 microperimetry.
• The data aids in evaluating retinal function and diagnosing visual impairments.