Effect of even and odd-order aberrations on the accommodation response

Area of Science:

• Ophthalmology
• Vision Science
• Optical Engineering

Background:

• Ocular aberrations, particularly monochromatic ones, can influence visual function.
• Understanding the role of specific aberration orders (odd and even) in accommodation is crucial for visual optics research.

Purpose of the Study:

• To investigate the effect of odd and even-order monochromatic aberrations on human eye accommodation.
• To determine if correcting these aberrations alters the accommodation response.

Main Methods:

• Eight healthy subjects with low astigmatism participated.
• An adaptive optics system measured accommodation response under natural, corrected odd-order, and corrected even-order aberration conditions.
• Accommodation demands ranged from 0 to 4 D.

Main Results:

• Accommodative lag increased when even-order aberrations were corrected at higher demands (1.5-4 D) compared to natural or corrected odd-order aberrations.
• No statistically significant differences in accommodation response were observed across the three conditions.

Conclusions:

• Odd and even-order monochromatic aberrations do not appear to aid the visual system's accommodation process.
• Partial correction of these aberrations does not affect accommodation performance.