Active pupillary prosthesis

An active pupillary prosthesis, comprising:

• a housing for receipt by an eye socket;
• a first disc having an aperture passing centrally therethrough and received by said housing, said first disc comprising a plurality of photochromic concentric rings encircling said aperture and rendered transparent or opaque as a function of light incident thereto;
• and
• a second disc adjacent said first disc, said second disc having a plurality of concentric light filter rings.

An ocular appliance for simulating pupillary activity, comprising:

• a housing;
• a first disc received by said housing and comprising a plurality of concentric rings of photochromic material about a central opening, said photochromic material being transparent or opaque as a function of light intensity incident thereto;
• and
• a second disc covering said first disc and comprising a plurality of concentric rings of light filtering material, respective rings of said filtering material being congruent with respective rings of said photochromic material.