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.
Gas exchange takes place in the capillaries for animals with a closed circulatory system such as birds, mammals, reptiles, and some amphibians. Remember that the capillaries are the smallest blood vessel, and they can be found near every cell in the body.