How Do Eyes Work? Identifying Key Terms in Vision Function
While we all have eyes, not all of us understand how they work. The process of vision can seem complicated, but in actuality it can be compared to a camera; each part works in conjunction with the other to provide vision, whether it is 20/20 or less than perfect. When all of the essential pieces of the eye work correctly, an image is perceived in the brain, creating vision. Below, Georgia Eye Physicians and Surgeons provides a look at how the components of the eye work together to create this fascinating process.
The eye of a camera can be compared to the cornea, which functions as the eye’s main focusing element. The cornea bends rays of light through the dark, round part of the eye called the pupil, which lies in the center of the iris—the colored part of the eye. Together, the iris and pupil combine forces to act as the aperture of a camera, the opening of the camera lens through which light passes.
The lens of the eye acts, fittingly, similar to the lens of a camera, focusing light to the back of the eye. In the back of the eye lies the retina, a membrane containing photoreceptor cells that change light into electrical impulses, directing them through the optic nerve and creating an image in the brain. The retina functions as the “film” in our comparative camera. The macula makes up the center 10% of the retina and accounts for sharp vision and seeing colors.
Sometimes, however, our eyes do not work as they should. The lens can become cloudy, a condition also known as cataracts. Board-certified ophthalmologist Dr. William Segal performs cataract surgery to remove cloudy lenses and replace them with artificial lenses, which come in various types depending on your individual needs.
When the cornea is improperly shaped, it can account for poor vision. Laser eye surgery reshapes the cornea, improving nearsightedness, farsightedness, and astigmatism. To determine the most effective option for laser vision correction candidates, Dr. Segal meets with each patient to examine the eyes and determine if LASIK, surface ablation, or another refractive procedure can help you achieve improved vision. For the month of January, we are currently offering $1000 off LASIK eye surgery.
To learn more about vision function or vision correction services at Georgia Eye Physicians and Surgeons, please contact us today to schedule a consultation. Don’t forget to connect with us on Facebook and Twitter for eye news, updates, and specials.