Once this type of retinal detachment develops and causes symptoms, it can progress to total blindness if it is not repaired promptly. In the United States, retinal detachment is a relatively uncommon condition, affecting only one of every 10,000 Americans each year.
Gas exchange in reptiles still occurs in alveoli however, reptiles do not possess a diaphragm. Thus, breathing occurs via a change in the volume of the body cavity which is controlled by contraction of intercostal muscles in all reptiles except turtles.
1 Gas exchange occurs in the alveoli of the lungs that provide a large surface area. 2  Here oxygen diffuses from the alveoli into the red blood cells in the capillaries that surround the alveoli. 3  Carbon dioxide, at high concentration in the blood, diffuses into the alveoli to be breathed out.