There are many different parts of the eye. A New York eye doctor (ophthalmologist) must examine the sclera, cornea, iris, pupil, lens and retina. The white part of our eye is the sclera which is the covering for most of the eye. Through the sclera we can see blood vessels in the eye as well. The iris is the colored part of our eye. There are muscles connected to the iris so that it can change its shape and determine how much light will go through the pupil. The pupil is where light shines through the iris, therefore when a lot of light is present the pupil gets smaller and when there is not as much light they will be larger. The pupil is the black part of our eye located in the middle of the iris. The cornea helps the eye focus on images as light shines through and is located in front of the iris. The lens is located behind the iris and deflects the light rays to the retina, which is located in the back of the eye. The retina transmits signals to the brain so the brain can recognize what the eye sees. Please visit our NYC Medical Group Doctors office for more information.
The retina processes the light it receives by using specialized cells called cones and rods. Rods cannot see color but they can give information on the shape and size of an object. Rods also allow us to see in the dark. Cones detect color and depend on more light than rods. There are three types of cones. Each is responsive to one of the following colors: blue, green, or red. These enable us to see a range of different colors.
When a person has trouble seeing images clearly this is due to differences in the lens, retina, and cornea inhibiting them to work together properly. Glasses or contacts with the appropriate prescription given by an Optometrist of Ophthalmologist can help correct this.
The front of our eye is protected by our eyelid. We blink naturally however our eyelids also have reflexes to close when an object comes too close to our eyes or when the light is too bright. Blinking also allows our eyes to moisten. Our eyelashes are also important as they protect our eyes from dirt.
Our eyes produce their own tears. In the corner of our eyes is the lacrimal gland which is where our tear ducts are located. Our tears help moisten our eyes and wash away any dirt that has gotten into the eye. Tears are our eyes natural way of healing themselves.
It is important to protect our eyes whether in a laboratory setting or in the sun. In a lab make sure to always wear goggles to prevent anything dangerous from getting into your eyes. In the sun it is important to wear sunglasses especially ones that are polarized to protect your eyes from the UV rays.