Ablation, also known as catheter ablation, is a treatment that aims to control or correct certain types of abnormal heart rhythms. It uses either heat (radiofrequency ablation) or freezing (cryoablation) on the area of your heart thatâs causing the abnormal heart rhythm (or arrhythmia). This treatment creates scar tissue which: breaks abnormal circuits in the heart; destroys areas of the heart muscle which are triggering arrhythmias.
Medical Definition of RHODOPSIN. : a red photosensitive pigment in the retinal rods of marine fishes and most higher vertebrates that is important in vision in dim light, is quickly bleached by light to a mixture of opsin and retinal, and is regenerated in the darkâcalled also visual purple. a red photosensitive pigment in the retinal rods of the eye of most vertebrates that is important in vision in dim light âcalled also visual purple. ADVERTISEMENT.
Pupil The pupil contracts and expands depending on the amount of light, and can physically block the amount of light entering the eye in bright situations. 1  Rod and cone cells in the retina-Our eyes sense light with two different types of cells: rods and cones. 2  Rhodopsin-Rhodopsin is a chemical found in the rods.hen a molecule of rhodopsin absorbs a photon, it splits into a retinal and an opsin molecule. These molecules later recombine naturally back into rhodopsin at a fixed rate, and recombinatiÂ­on is fairly slow. So, when you expose your eyes to bright light, all of the rhodopsin breaks down into retinal and opsin.