Date of Award


Degree Type


Degree Name

Master of Science in Vision Science

Committee Chair

Paul Kohl


Sixty-four healthy full term infants between 6 and 24 months of age were tested using the Lang Stereotest. A full vision examination including visual acuity assessment using the Teller acuity card preferential looking procedure, near point of convergence, Worth test for eccentric fixation, Hirschberg test, and monocular estimate method to measure accommodative posture was performed. Ocular health was also assessed to rule out pathology. Results showed that 90% of the 6.0 to 12.0 month age group, 100% of both the 12.0 to 18.0 and 18.0 to 24.0 month age groups were able to respond positively to at least one stereo image on the Lang Stereotest. Performance showed improvement with age.

Included in

Optometry Commons