Visual Acuity: Visual acuity is a term used to describe the clarity of vision. It is measured at a distance of 20 feet. Medical professionals use the expression 20/20 vision to measure and convey information about a patient’s vision. If a person has 20/20 vision it means they can see clearly at 20 feet what the average person should see at 20 feet. If someone has 20/70 that means that they can see clearly at 20 feet what a 20/20 person can see at 70 feet. Refractive Error, Eye and Systemic diseases cause a patient not to have 20/20 vision.
Optometrist: An optometrist is a doctor who is licensed by the state they practice in to diagnose and treat a wide range of eye health related diseases and disorders. Optometrist are required to have a four year undergraduate degree. This is followed by a four year doctor of optometry (O.D.) degree from an accredited college of optometry. Residencies and fellowships are available. Continuing education is required to insure optometrists are up-to-date on treatment and new procedures.
Ophthalmologist: Ophthalmologists attend four years of medical school then a three year residency in eye related training. They can choose to specialize in areas as retina or cornea.
How the Eye Works: Reflected lenses, multiple lighting adjustments and information processing are all part of the engineering of the eyeball. When working correctly, the human eye converts light into impulses that are conveyed to the brain and interpreted as images.
The Eye compared to a Camera: The eye is often compared to a camera. Light enters the eye through the cornea. The cornea bends the light rays so they enter the eye through the opening of the iris (the pupil). The pupil is an adjustable opening the controls the intensity of light entering the eye. The iris increases and decreases in size depending on how much light enters the eye, similar to a shutter on a camera. After the light rays pass through the iris, the light rays pass through the crystalline lens in the eye. This clear structure functions like a lens in a camera, shortening and lengthening its width in order to focus light rays. The light continues its journey through the eye by passing through the vitreous, a gel like substance behind the lens that helps the eye hold its shape. In an eye with 20/20, the light rays make a sharp focus point of the retina. The retina is the nerve layer of the eye. It works like the film of a camera. The retina captures the light rays, processing them into nerve impulses, then send the impulses through the optic nerve and finally the brain.
Common eye disorders and diseases we diagnose and treat at Jewell Eye. If you experience any of these call for an appointment.
Amblyopia: Amblyopia is commonly referred to as Lazy eye. It is a loss or lack of development of vision, usually in one eye. This degenerative process appears during infancy and early childhood. It needs to be diagnosed between birth and early school age. Since it is during this period that neurological pathways are developing.
Blepharitis: Blepharitis is a general term for an inflammation of the eyelid and lashes. It is a common condition usually resulting from poor lid hygiene, low-grade bacterial infection or an allergic reaction and/or abnormalities in oil gland function.
Cataract: A cataract is a clouding of the clear lens, which leads to a progressive blurring of vision. It is usually age related. When cataracts disrupt your daily life, your doctor may recommend cataract-removal surgery.
Computer Vision Syndrome: Computer Syndrome is characterized by neck pain, blurry vision and headache when working on the computer. Special lens designs for computer work provide a larger area for viewing the computer.
Conjunctivitis: Conjunctivitis Or Pink Eye is an infection or inflammation of the conjunctiva – the thin membrane that covers the surface of the eyeball and inner surface of the eyelids. It is caused by bacteria, viruses, allergens and other irritants like smoke and dust. It is can be contagious and is accompanied by redness and increased tearing and/or discharge.
Diabetic Eye Disease: Diabetic Eye Disease is a general term for a group of eye problems that can result from having type 1 or type 2 diabetes, including diabetic retinopathy. Often there are no symptoms in the early stages of diabetic retinopathy.
Dry Eye Syndrome: Dry Eye syndrome refers to a breakdown in the quantity or quality of tears to moisten, cleanse and protect the eyes. When this protective coating dries up, the eyes feel gritty or burn and can be more sensitive to light.
Floaters and Spots: Floaters and spots are small spectacles within the vitreous of the eye. They appear in various shapes, sizes, threadlike strands or cobwebs. They are common and are usually harmless.
Glaucoma: Glaucoma is an increase in the intraocular pressure of the eyes, which causes damage to the optic nerve with no signs or symptoms in the early stages of the disease. If untreated, glaucoma can lead to a decrease in peripheral vision and eventually blindness. While there is no cure for glaucoma, there are medications and surgery available that can help halt further vision loss.
Macular degeneration: Macular Degeneration is a progressive disease that destroys central vision due to a deterioration of the macula. The types are dry with that progresses slowly with no treatment while wet progress quickly and may be treated with laser.
Strabismus: Strabismus refers to a condition in which eyes are misaligned. It occurs when the muscles that control eye movement are not working together. The result is one or both eyes turning inward, outward, upward or downward.