Uploaded February 2026 | Updated September 2026, 2 weeks ago
scitechdaily.com/nearsightedness-is-surging-worldwide-and-the-cause-may-be-hiding-indoors
Movie demonstrating the increase in accommodative eye vergence and pupil constriction when the fixating eye (left side of image, right eye of subject) is exposed to -5D defocus. The occluded eye (right side of image, left eye of subject) turns inward as if the stimulus was approaching the subject and the pupils constrict in both eyes. Both eyes are visible in the movie because they are both being recorded with Tobii glasses. When defocus is perceived by the fixating eye, the accommodation power of the crystalline lens increases to focus the stimulus. This increase in accommodation is accompanied by an increase in eye vergence and pupil constriction.
Credit: Alonso Lab at SUNY Optometry
scitechdaily.com/nearsightedness-is-surging-worldwide-and-the-cause-may-be-hiding-indoors
Movie demonstrating the increase in accommodative eye vergence and pupil constriction when the fixating eye (left side of image, right eye of subject) is exposed to -5D defocus. The occluded eye (right side of image, left eye of subject) turns inward as if the stimulus was approaching the subject and the pupils constrict in both eyes. Both eyes are visible in the movie because they are both being recorded with Tobii glasses. When defocus is perceived by the fixating eye, the accommodation power of the crystalline lens increases to focus the stimulus. This increase in accommodation is accompanied by an increase in eye vergence and pupil constriction.
Credit: Alonso Lab at SUNY Optometry
