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.
The direct process of gas exchange occurs in alveoli  located within the lungs. Blood is sent fâ¦rom the heart through  pulmonary arteries, exchanging the carbon dioxide within  erythrocytes (red blood cells) for oxygen provided by the air lungs  store when inhaling.