ALEXANDRIA, Va., March 17 -- United States Patent no. 12,575,787, issued on March 17.

"Apparatus and method for the detection of dementia and retinal conditions" was invented by Jeffrey N. Weiss (Parkland, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus and method for aiding in the detection of dementia, concussion, other neurologic conditions, retinal, and optic nerve conditions. The apparatus enables the diffusion coefficient of the tissue to be ascertained and studied by directing the light from a laser or other coherent light source at the patient's retina, optic nerve or choroid and measuring the fluctuations in the intensity of the back-scattered light caused by the movement of light s...