Mohan A, et al. - Investigators studied 32 amblyopic, 24 normal and 13 fellow eyes of subjects of age less than 18 years to quantify the retinal vascular oxygen saturation in amblyopic eyes comparatively with unaffected fellow eyes and eyes of normal subjects. They observed median corrected distance visual acuity in the amblyopia group, 20/50 vs 20/20 in the other groups. They reported the average arteriolar and venous saturation in the amblyopia, normal and fellow group, 84.5%, 83.2% and 80.8% and 51.9%, 50.8% and 49.3%, respectively. They noted higher mean oxygen saturation in amblyopic eyes as compared to the fellow eyes. They considered it due to modified neuronal activity or due to a measurement artefact because of revisions in retinal reflectivity.