Eye examinations improve visual acuity across ages.

Objective: To investigate changes in distance best corrected visual acuity (BCVA) relative to presenting visual acuity (PVA) as a function of age and the number of years between eye examinations.

Design: Retrospective cross-sectional study.

Participants: 6397 patient files at a large Canadian Optometric Clinic.

Modifications made to the refractive result when prescribing spectacles.

Purpose: The purpose of this study was to determine how optometric practitioners modify the subjective refractive result when prescribing spectacles.

Methods: Refractive data were gathered for patient visits at the School of Optometry, University of Waterloo, between January 2007 and January 2008. The entering prescription, subjective refraction, and exiting prescription were analyzed from 5001 records for patients aged ≥ 7 years.