The BHVI-EyeMapper: peripheral refraction and aberration profiles.

Area of Science:

• Ophthalmology and Optometry
• Optical Engineering
• Vision Science

Background:

• Understanding peripheral refractive error and higher-order aberrations is crucial for myopia development.
• Accommodation significantly influences central and peripheral vision.
• Limited instruments exist for rapid, wide-field peripheral measurements.

Purpose of the Study:

• To present the optical design of the BHVI-EyeMapper (EM) for rapid peripheral wavefront measurements.
• To compare peripheral refraction and higher-order aberration profiles in myopic eyes with and without accommodation.

Main Methods:

• Measured refractive errors (M, J180, J45) and higher-order aberrations (C[3, 1], C[3, 3], C[4, 0]) in 26 myopic participants.
• Performed measurements along the horizontal visual field with (-2.00 to -5.00 D) and without (+1.00 D fogging) accommodation.
• Analyzed changes using tilt and curvature coefficients.

Main Results:

• Accommodation increased, peripheral refraction (M, J180) became significantly more negative and asymmetric.
• No significant changes were observed in J45 profiles with accommodation.
• Peripheral aberration profiles (C[3, 1], C[3, 3], C[4, 0]) became significantly less asymmetric during accommodation.

Conclusions:

• Accommodation induces significant changes in peripheral refraction and higher-order aberration profiles in myopic eyes.
• The BHVI-EyeMapper (EM) facilitates rapid peripheral measurements up to ±50 degrees for distance and near.
• The EM instrument offers advanced capabilities for myopia development research.