The Center of Rotation of the Eye

Off‐axis partial coherence interferometry in myopes and emmetropes

“…To obtain the complete set of readings for peripheral measurements, the participant was requested to look at the cross target on the beam splitter for each eccentric location along each meridian. The attachment was positioned and rotated around the centre of rotation of the eye, which was assumed to be located approximately 14.8 mm behind the corneal apex . This was approximately equal to a 50 mm distance between the participant's cornea and beam splitter.…”

“…The attachment was positioned and rotated around the centre of rotation of the eye, which was assumed to be located approximately 14.8 mm behind the corneal apex. 26 This was approximately equal to a 50 mm distance between the participant's cornea and beam splitter. This device lay between the headrest and the instrument and the beam splitter was placed close to the eye at an inclination of 45°t o the visual axis.…”

Role of corollary discharge in space constancy

“…Because eye position in another person is usually judged by the amounts of sclera visible on the sides of the iris, it is easy for an observer to misattribute the translation of the eye to a passive rotation in the direction of the press. Without fingerpress, the eye does not normally translate within the orbit, either by theory (Fry & Hill, 1962, estimated that 1I200th of a 10-deg rotation might be translation due to a nonstationary center of rotation) or by experimental measurement (Krishnan & Stark, 1977, measured a 15-arc-min-equivalent maximum bound for such movements).…”

The Implications of Ocular Occlusion

“…This analysis, however, requires the assumption that the point of observation and the center of rotation in the eye are coincident; they are not. The center of rotation is located near the center of the eye (Bennett &Rabbetts, 1989;Fry &Hill, 1962;Le Grand &El Hage, 1980;Park & Park, 1933;Verrijp, 1930) whereas, as we have shown, the point of observation is located in the entrance pupil at the front of the eye at a distance of 11 mm from the center of rotation.…”