demented,
autistic, disabled, etc.). Two currently marketed portable auto-refractors (Welch Allyn
SureSight and Nikon Retinomax), which are priced at $5,000 and more than $12,000,
are too fragile ... cost autorefractor will face significant competition. The
principal competing products are the Nikon Retinomax and the Welch Allyn SureSight
autorefractors, because they are portable and are the lowest-priced autorefractors