|Title||Clinical Application of Two-Color Dark Adaptometry: A Case Series|
|Author, Co-Author||Carolyn Talbert, Ruh Patel, Brooke Houser, Jeff Rabin|
Background: Numerous retinal diseases include sensitivity loss under dark and/or light adapted conditions. However, dark adaptometry (DA), which quantifies dark and light adaptation, is an elusive test available only at medical centers and universities which include related testing: flash, multi-focal, pattern electroretinography (ERGs), electro-oculography (EOGs), visual evoked potentials (VEPs) conducted in accord with international standards (www.iscev.ogr). To improve diagnosis of ocular disease, we developed a DA test to be given during the 20 minute dark adaptation phase of flash ERGs. The test is conducted in the Ganzfeld used for ERGs (Diagnosys, LLC) with alternating red and blue stimuli to elicit responses from cones (red) and rods (blue) yielding a red and blue two-curve DA function during. The final DA thresholds, sensitivity during various points during the 20 minute DA period, and amount of time to achieve specific levels of sensitivity were used to for diagnosis. We describe the efficacy of this technique for diagnosis in a diverse series of patients referred to our Visual Neurophysiology Service from Ophthalmology Retinal Specialists.
|Affiliation of Co-Authors||UIW Rosenberg School of Optometry, UIW Rosenberg School of Optometry, UIW Rosenberg School of Optometry|