System and method for performing objective perimetry and diagnosis of patients with retinitis pigmentosa and other ocular diseases

A method for determining a state of health of an eye using a multifocal pupillometer, wherein:

• the multifocal pupillometer comprises an ocular fixture, a testing compartment, at least one camera, and a controller;
• the testing compartment comprises a plurality of chromatic beam emitters arranged about a visual field of the pupillometer, the plurality of chromatic beam emitters are structurally configured to generate chromatic stimuli and to provide red and blue stimuli;
• the ocular fixture is positioned to facilitate exposure of light sensitive ocular structures of the eye to the chromatic stimuli of the plurality of chromatic beam emitters;
• the at least one camera is positioned to record temporal pupil contraction of the eye in response to the chromatic stimuli of the plurality of chromatic beam emitters;
• the controller controls emission wavelength, intensity, and duration of the chromatic beam emitters;
• the controller processes temporal pupil contraction data recorded by the at least one camera to generate latency of maximal contraction velocity signals and percentage of pupil contraction or maximal contraction velocity signals representative of the eye positioned at the ocular fixture in response to the chromatic stimuli of the plurality of chromatic beam emitters at a plurality of locations in the visual field of the pupillometer;
• and
• the method comprises
• positioning a subject eye at the ocular fixture,
• driving a selected first subset of the plurality of the chromatic beam emitters with the controller into a first illumination mode to determine an extent of a functional visual field of the subject eye from the percentage of pupil contraction or maximal contraction velocity signals, and
• driving a selected second subset of the plurality of the chromatic beam emitters with the controller into a second illumination mode to determine the state of health of the subject eye as an objective function of mean absolute deviation in the latency of maximal contraction velocity signals between the plurality of locations in the visual field, wherein the controller selects and drives the second subset of the plurality of chromatic beam emitters based on the extent of the functional visual field determined in the first illumination mode.