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.
In one word gas exchange for humans occur in lungs. Our wind pipe which starts from nasal and oral cavity extends to lungs where it is divided into left and right know as bronchi. The bronchi gets further divided and re-divided many times in lungs. Each time it is divided there is a decrease in its size.