Realtime Measurement of Ocular Alignment
typical eye of a ten year old boy
To develop a system with video-cameras and infrared light-source
based on a PC for automatic and objective measurement of the angle
of strabismus of children and infants.
The pictures of the left and the right eye with a size of 768 times 512 pixels are evaluated for
the Purkinje I and IV reflection pattern and the positions of the
pupils and the iris. With that the relative and
absolute positions of the optical and visual axes of both eyes can be computated and
therefore the ocular alignment to detect microstrabismus.
The system is able to analyze up to five pairs of pictures per
second and therefore it is able to determine dynamical strabismus. It is besides
robust against impairments like reflecion on glasses and partial
covering by eye-lid.
calculated data for computation of the optical axes of the eye
Editor: Rainer Schian
Letzte Änderung: 14.04.98