Accommodative Adaptation to Monocular and Binocular Stimuli

ABSTRACT Pre‐ and post‐task measures of dark‐focus (DF) were used to assess accommodative adaptation induced by a 45‐s near‐vision task at 33 cm. Adaptation was measured under monocular and binocular conditions for a group of 10 young emmetropic subjects (mean age 21.6 years). The accommodative response was measured objectively using an infrared optometer (Canon Autoref R‐1). Post‐task DF was sampled immediately after the task at 1‐s intervals over a 90‐s period. No significant difference in accommodative adaptation was observed between the monocular and binocular near‐vision tasks. The implications of this finding are discussed with regard to the oculomotor constituents of the closed‐loop accommodative response.