Researchers found that ocular response to optical defocus varied significantly depending on the time of day.

Ranjay Chakraborty, PhD, and colleagues reported at the Association for Research in Vision and Ophthalmology meeting that they measured the axial length and anterior chamber depth (ACD) of 13 emmetropic young adults (mean age 23 years) over 3 consecutive days with the IOLMaster 500 (Zeiss).