Family Eye Care Clinic, P.C.
The Dry Eye Center of East Texas
What are the types of dry eye?
1) Aqueous tear-deficient dry eye is a disorder in which the lacrimal glands fail to produce enough of the watery component of tears to maintain a healthy eye surface.
2) Evaporative dry eye may result from inflammation of the meibomian glands, (Meibomian Gland Dysfunction) also located in the eyelids. These glands make the lipid or oily part of tears that slows evaporation and keeps the tears stable.
Dry eye can be associated with:
Smartphone Use Linked to Dry Eye in Schoolchildren
There might be another cost associated with children using smartphones besides a large monthly bill from the phone company: It could be causing kids to develop dry eye disease at an early age.
Researchers in Korea evaluated risk factors for dry eye disease among schoolchildren who used video devices, including smartphones. They examined 288 children and classified them as either having dry eyes or having a normal, moist eye surface (control group). Each child completed a questionnaire concerning the types of video devices they commonly used (computer, smartphone and television) and the amount of time they spent using each device.
Among the participants, 9.7 percent were diagnosed with dry eyes, and 90.3 percent comprised the control group. Smartphone use was more common in the dry eyes group than the control group (71 percent vs. 50 percent), and increased daily duration of smartphone use was associated with increased risk of dry eye disease, as was the total hours per day spent using all video devices combined.
One interesting finding is that increased duration of computer use and television viewing measured separately did not increase the risk of dry eye disease.
The study authors concluded that smartphone use is an important dry eye disease risk factor in children, and that parents should monitor the amount of time their children spend using video displays, especially smartphones, on a daily basis. The study report appeared in the April 2014 issue of Journal of Pediatric Ophthalmology and Strabismus. — G.H.
FAQ About Dry Eye
What is the cornea?
The cornea is the clear, dome-shaped outer surface that covers the eye in front of the iris, the colored part of the eye. The cornea helps protect the rest of the eye from germs, dust, and other harmful matter. The cornea bends, or refracts, light entering the eye, and accounts for most of the eye’s total focusing power. It also serves as a filter to screen out most of the damaging ultraviolet (UV) wavelengths in sunlight.
The cornea is a highly organized, clear structure made up of a group of cells and proteins precisely arranged in layers, but it has no blood vessels to nourish or protect it against infection. Instead, it receives its nourishment from the tears and the watery fluid (aqueous humor) that fills the chamber behind it.
What are tears, and how do they relate to dry eye?
Tears are necessary for overall eye health and clear vision. Tears bathe the surface of the eye, keeping it moist, and wash away dust and debris. They also help protect the eye from bacterial and other types of infections. Tears are also necessary for maintaining the health of the front surface of the eye and for providing clear vision.
Tears are composed of three major components: a) outer, oily, lipid layer produced by the meibomian glands; b) middle, watery, lacrimal layer produced by the lacrimal glands; and c) inner, mucous or mucin layer produced by goblet cells located within a thin transparent layer over the white part of the eye and covering the inner surface of the eyelids.
Tears are constantly produced to bathe, nourish, and protect the eye surface. They are also produced in response to emergencies, such as a particle of dust in the eye, an infection or irritation of the eye, or an onset of strong emotions. When the normal amount of tear production decreases or tears evaporate too quickly from the eyes, symptoms of dry eye can develop.
Any disease process that alters the components of tears can make them unhealthy and result in dry eye.
Causes and Risk Factors
What are the causes of dry eye?
Who is likely to develop dry eye?
Elderly people frequently experience dryness of the eyes, but dry eye can occur at any age. Nearly five million Americans 50 years of age and older are estimated to have dry eye. Of these, more than three million are women and more than one and a half million are men. Tens of millions more have less severe symptoms. Dry eye is more common after menopause. Women who experience menopause prematurely are more likely to have eye surface damage from dry eye.
Self Care
Steps you can take to reduce symptoms of dry eyes include:
Increasing the level of humidity in the air at work and at home.
We look forward to seeing you in the near future. Appointment requests and additional information on our other services can be found through our main web-site at www.familyeyecareclinic.net