System for producing selective stabilization of a portion of the retinal image

A system capable of producing a stabilized obscuration on a retina which comprises:

• (a) means for projecting the image of a visual scene along a first portion of an optical path, including:
• (1) first and second mirrors positioned serially along the optical path, each of said mirrors being mounted for rotation about an axis corresponding respectively to horizontal and vertical eye movements;
• and
• (2) optical means for forming an image of the eye at each of the first and second mirrors, with the center of rotation of the eye in each image nominally at the axes of rotation of the said first and second mirrors;
• (b) first and second control means to respectively rotate the said first and second mirrors about their axes in response to movement of the eye;
• (c) reflective means for projecting at least a portion of the scene image back along the same optical path in a reverse direction to the eye of a subject whereby a second portion of said optical path is superimposed on said first portion of said optical path to thereby negate the compensating effect for eye movement in said first portion of said optical path;
• and
• (d) means of preselected shape and size positioned between said first portion of said optical path and said second portion of said optical path for forming an obscuration on the retina which is stabilized with respect to eye movement.