• The Zhang Ring Test™ is an updated home monitoring test card designed by Dr. Fuxiang Zhang, MD, to promote early detection of vision-threatening conditions. It combines three components into a single test: a peripheral ring for retinal evaluation, a central square grid for macular assessment, and a mini near-vision chart for detecting functional vision changes.
• The Zhang Ring Test Plus™ builds upon the original Zhang Ring Test™, expanding its capability to monitor peripheral, central, and functional vision. It is designed to aid in the detection of conditions such as blinding retinal detachment, retinal vascular occlusions, and optic nerve disorders.
• Clinical Trial Approved by The Institutional Review Board of Henry Ford Health System may be read here

Retinal detachment is a potentially blinding condition in which early detection is critical. As noted by Ophthalmic Mutual Insurance Company (OMIC), “when we look at the clinical categories of diagnostic error, retinal claims far exceed all other types,” with retinal detachment being the most frequently missed diagnosis. Read more from the Academy of Ophthalmology article here.

Retinal detachment (RD) is a potentially devastating blinding disease and the prognosis is mainly determined by how soon it is diagnosed and managed surgically. There is a need to have surveillance in high-risk patients. A home used device to monitor retinal detachment is helpful as Ocular emergency cases are quite common with floaters, flashes of light, with or without peripheral vision or central vision decrease, however The Zhang Ring Test™ provides an easy to use screening test in emergency medicine, urgent care, patient home and other settings in this regard. Each SKU 9103 consists of a Pad of 50 tests with instructions printed directly on the test.

“I showed this product in the Cutting Edge Symposium at the 2018 annual meeting of the American Academy of Ophthalmology. It was included because ophthalmologists give Amsler Grids to patients with macular disease for home testing, so it makes sense to offer the Zhang Ring Test to patients with increased risk for retinal detachment.”- Robert H. Osher, M.D