Patent Document ID: 4660945
Application ID: 06829555
Patent Flag: 1

Claim One:
1. Accommodation training apparatus comprising: optometer means for imaging radiation onto the plane of the pupil of an eye to form a retinal image and directly measuring the refraction of said eye as a function of said retinal image, said optometer means providing outputs representing said refraction of said eye on a periodic basis and at a rate corresponding to a plurality of measurements each second; means for selectively introducing a visible alignment image to said optometer means at a location where radiation associated with said alignment image is coaxial with imaging radiation imaged by said optometer means onto the plane of the pupil of an eye, said alignment image for aligning an eye to be measured with said optometer means being introduced while said optometer means is imaging radiation onto the plane of the pupil of an eye to be measured, said alignment image being introduced into said optometer means in a manner to be imaged upon the iris of said eye at the plane of said pupil and form a visible alignment image thereon; and audio means responsive to each output of said optometer means for producing a tone having a frequency value representative of said refraction of said eye being measured.