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DRY EYE SYMPTOMS
If you have two or more symptoms, you may have Dry Eye Disease, and should discuss your symptoms with your doctor.
Dry eye (also called dry eye syndrome) is a very common condition. Dry eye occurs when people don’t have either enough tears, or the correct composition of tears, on the surface of their eyes to lubricate the eyes and keep them comfortable. Dry eye’s prevalence increases with age, so that it is extremely common in older people. The condition affects two-to-three times more women than men. About six million women and three million men in the U.S. have moderate or severe symptoms of the disease, and scientists estimate that an additional 20 to 30 million people in this country have mild cases of dry eye.
If you have dry eye, your eyes can feel persistently gritty, itchy, burning, and painful. These sensations often worsen as the day goes on. Stringy mucus may appear in or around the eyes. In the past doctors had to rely on your description and dye testing to diagnose this disease and had no good way to measure whether it was getting better. Now thanks to a breakthrough technology from TearLab, you can be tested and given objective results immediately. Your doctor will take a sample of tears from each eye and use the TearLab to measure osmolarity. The sample required is no larger than the period at the end of this sentence. Once your osmolarity number is determined, your doctor can design a treatment regimen tailored to your condition. We also use InflammaDry®, the first and only, rapid result, in-office test that detects elevated levels of MMP-9, an inflammatory marker that is consistently elevated in the tears of patients with dry eye disease. All other dry eye tests measure tear production and stability. InflammaDry identifies patients that may otherwise be missed with other dry eye testing methods.
Tear film consists of three layers. The outer, oily layer of the tear film is produced by the meibomian glands in the eyelids and reduces evaporation of the tears. The thick, middle, watery layer is made by the lacrimal gland above the upper eyelid and washes away irritants. The inner, mucus layer is secreted by the goblet cells in the conjunctiva of the eyelids and helps the tear film stick to the cornea.
Dry eye syndrome is not a frequent cause of blindness; however, it is still an important public health problem. One reason for this is that it is so common. In fact, visits for dry eye syndrome are one of the leading reasons for patients to seek eye care. This is because its symptoms are very bothersome and lead to a decreased quality of life, reduced work capacity, and poorer psychological health. Furthermore, dry eye syndrome is associated with a decreased ability to perform activities that require visual attention, such as reading and driving a car. Patients with the most severe disease are at increased risk of developing corneal infection, scarring or ulceration.
Severe dry eye is sometimes caused by Sjögren's syndrome, which is a chronic, multi-organ, autoimmune disorder that also results in dry mouth and often arthritis. You should be under a doctor’s frequent care if you have Sjögren's.
Anything that may cause dryness, such as an overly warm room, hair driers, smoke, or wind, should be avoided by any person with dry eye. A humidifier in heated rooms may help. If wearing contact lenses increases your discomfort, wear spectacle eye-glasses instead. Some people with dry eye complain of scratchy eyes when they wake up; this symptom can be treated by using an artificial tear ointment at bedtime. There is some evidence that, in older women, hormone replacement therapy makes dry eye worse; if you are using HRT, talk to your doctor about this. And seek help if symptoms occur frequently or interfere with your functioning; it is important to see an ophthalmologist or optometrist to rule out corneal injury or infection.
The first line of treatment is usually artificial tears that give some temporary relief. These solutions and ointments do little to arrest or reverse any damaging conditions. Many brands are available without a prescription. For mild cases, try several to find the one you like best. The preservatives in some eye drops can irritate the eye; preservative-free artificial tears may be required. Researchers are trying to develop better artificial tears, especially ones that are formulated to normalize the electrolyte balance while lubricating the ocular surface. One promising new treatment now in clinical trials is the use of eye drops containing andogen. Nutritional supplements such as flaxseed or fish oil capsules may also be beneficial.
For more severe cases of dry eye, in which the cornea is inflamed, anti-inflammatory agents are sometimes prescribed. Topical steroids (in eye drops) are safe for short-term use, to combat inflammation, but can cause side-effects when used for a long time. RESTASIS™ and XIIDRATM prescription eye medications are a valuable treatment option for many dry eye patients. RESTASIS combats dry eye disease by helping the eyes produce healthier and more abundant tears. XIIDRA is approved to treat the signs and sypmtoms of the disease. A current research area is how to actively suppress inflammatory mechanisms, rather than just passively lubricate the surface of the eye.
Tears drain out of each eye, and into the nose, through a small channel. Your ophthalmologist may decide to close these channels either temporarily or permanently, to keep the tear film on the surface for a longer time. For some forms of dry eye, tiny plugs can keep tears on the eye’s surface by slowing the rate of drainage from the eye; this procedure is called punctual occlusion.