Why Do They Dilate my Eyes for an Eye Exam?

Pupil dilation is extremely important because it allows the optometrist to see all the way into the back of the eye. During a normal eye exam, the optometrist will use a bright light and a lens to look into the eye, inspecting the health of the cornea, iris, and lens of the eye. However, the bright light causes the pupil to contract, making it difficult for the optometrist to see the back of the eye. When the regular eye exam is done, the optometrist will dilate your pupils so that he or she can completely check your optical health.

The back of the eye hosts the retina, optic nerve, and important blood vessels. When your pupils are dilated, the optometrist will be able to clearly see these parts of the eye and evaluate them. Pupil dilation can reveal general health problems like diabetes, hypertension, and can also catch the signs of glaucoma and cataracts early. For these reasons, optometrists ask their patients to submit to pupil dilation with every eye exam, despite the inconvenience, because they would rather catch serious medical problems early. Healthy kids and adults should have an eye exam, along with pupil dilation, every one to two years, or more frequently as recommended by an optometrist. People who are at high risk for developing optical conditions may need to have their eyes examined more frequently.

How does Diabetes affect the eyes?

eye-woman-595x240Diabetes is a leading cause of blindness and visual impairment in the United States. A person with diabetes has 25 times the risk of blindness compared to a no diabetic person, and diabetic retinopathy (bleeding in the retina secondary to diabetes) is the leading cause of new blindness in Americans of working age.

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Why does a contact lens prescription expire in one year and an eyeglass prescription expire in two years

A contact lens prescription is good for only one year because the materials come in direct contact with the front of the eye, the cornea. The materials Contact-Lensescan alter the superficial cells of the cornea by decreasing oxygen to the tissue. This can contribute to complications such as corneal edema (swelling) and blood vessel growth around the periphery, strongly indicating a lack of oxygen to the tissue. Read more

Polarized Lenses Vs Non Polarized

The intensity of light, polarized waves is much higher than the scattered ones. These kind of light waves have been proven to be harmful for the eyes and especially for those who are driving. Glare from these types of light waves can impair vision that can lead to road accidents.Polarized-Sunglasses

Sunglasses made from polarized lenses are able to block glare because they are vertically polarized and designed to block the light reflected by flat surfaces which is horizontally polarized. Read more