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Presbyopia is an age related condition that effects your ability to focus clearly on near objects like printed text, computer screens and photographs. It primarily affects people over the age of 40 and is not a disease.
When light from a close object enters the eye it naturally comes to focus behind the retina. To focus the light properly the cilliary muscle around your lens contracts,...
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So you’ve had your eyes examined and picked out your new frames, and now you have an array of lens options from which to choose. One important option to consider is investing in an Anti-reflective coating, also known as AR coating. This feature has multiple advantages that can benefit almost anyone who wears glasses.
Today’s modern lens materials have a higher refraction index than previous...
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- Written by Harbor View Eye Care Team
There are two basic types of astigmatism; myopia and hyperopia. These two types affect up to one third of the population and can be treated in a variety of ways from corrective lenses to surgery.
Myopia, or nearsightedness occurs when the eyeball is slightly longer than usual from front to back or the shape of the cornea is too steep. This causes the light entering the eye to come to a...
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The colored part of the eye is called the iris. It is composed of two muscles. The constrictor and the dilator. The black circle at the center of the iris is called the pupil and is actually just an opening to allow light into the eye. The pupil appears black because the inside of the eye contains pigment to absorb all of the light that enters it, not allowing any of it to reflect back out.
When light enters your eye there is a muscular reflex in your iris to regulate the amount of light that hits the retina. Too much light and constrict muscles tighten to making your pupil smaller to limit the amount of light entering your eye. Not enough light and the dilator muscles contract allowing your pupil to get bigger.
During a comprehension eye exam, your eye doctor might want to dilate your pupils to evaluate the back of each eye under high magnification. Without dilation, the bright exam light automatically causes your pupils to constrict, making a much smaller opening to look through.
Dilating drops cause your pupils to enlarge by inhibiting the constrictor muscles from reacting to light., then the doctor can use a bright exam light combine with a magnification lens for an unobstructed view of the internal structure of each eye, including the retina, macula and optic discs.
Dilation drops typically cause blurred near-vision and light sensitivity lasting about 4 to 6 hours. Sunglasses are usually worn afterward to relieve glare discomfort, but you should be safe to drive with caution.
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