Optokinetic nystagmus is an involuntary reflex of the eyes that occurs when an individual sees a moving object or pattern. It is well-recognized as a method of assessing visual acuity, but has, to-date, always been a highly subjective process for the detection of gross visual problems.
Optokinetic nystagmus is the basis of our new approach to measuring visual acuity.
Objective Acuity Technology
The process is as follows:
Subject sits in front of screen
Moving optotype appears on screen
Moving optotype induces nystagmus
Detection systems correct for head movement, identify eyes and detect nystagmus
Optotypes diminish until nystagmus ceases
Final output in standard acuity units
Adults and children at school entry have been tested with early prototypes. With these early prototypes, we have demonstrated we can detect acuities of 20/32 (6/9.5) and worse. With improvements that are currently being developed, we have every indication that the system will measure threshold acuity.
A single acuity measurement currently takes around 5 seconds.