Visual Perception: Unlocking the Science of Clarity
Introduction and Definition of Landolt Circles The Landolt Circle, often referred to as the Landolt C or Landolt Ring, stands as a fundamental and internationally recognized optotype used primarily for the precise measurement of visual acuity. Visual acuity, defined as the spatial resolving power of the visual system, is a critical metric in ophthalmology and […]
ELECTRORETINOGRAM (ERG)
Introduction Electroretinogram (ERG) is an objective method for measuring electrical activity in the retina in response to light. It is a non-invasive procedure which is used to measure the functioning of the rod and cone photoreceptors in the retina. The technique has been used in the diagnosis and management of a variety of retinal diseases, […]