The Dark Focus of Visual Accommodation: Its Existence, Its Effects, Its Measurement

The "dark focus" or "resting state" of visual accommodation to the refractive state to which the eye tends to return in the absence of any visual stimulus, as in complete darkness. This tendency is reviewed in terms of past and current attempts at its quantification and its effects on visual performance. In Experiment I, a new optometer -- the polarized vernier optometer -- is described and compared experimentally to the better-known laser optometer. The former compared favorably to the latter in terms of subject acceptability and agreement of dark focus measurements.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Psychology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Simonelli, Nicholas Michael

• Psychology, Experimental

Language dc:language

eng

Identifier

(UMI)AAI8017984

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/66573