Automatic optometer operates with infrared test pattern

Refractive strength of human eye is monitored by optometer that automatically and continuously images infrared test pattern onto the retina. Condition of focus of the eye at any instant is determined from optometer settings needed to maintain focus of the pattern on the retina

Visual focus stimulator aids in study of the eye's focusing action

Optical apparatus varies apparent distance of a target image from the eye by means of reflectors that are moved orthogonally to the optical axis between fixed lenses. Apparatus can be pointed at any object, test pattern, or other visual display

Design of an optometer and two-dimensional eye tracker Final report

Double Purkinje two dimensional tracking of eye position for optometer desig