Water Advocate Kleyne Fights Dehydration of the Eyes. Eyes Must Be Supplemented with Pure Water Says Water Researcher Kleyne.
Bio-Logic Aqua® Research Water Life Science® founder, Sharon Kleyne, has spent more than two decades educating others about dehydration and dry eye disease. Her internationally respected research has led to breakthroughs in the relief of dry eye and understanding the role excessive evaporation plays in a host of illnesses and diseases.
Evaporation is the change in the structure of water from a liquid state into a vapor or gaseous state. All liquid and frozen water evaporates. However, environmental factors such as dry air and warm temperatures accelerate the evaporation process. Evaporation of body water vapor into the atmosphere occurs constantly for all living things. As a result, the objective of living organisms is to slow down the evaporation process by supplementing the lost body water vapor with pure, fresh water. When the rate of water evaporation exceeds the organism’s ability to replace the water, death will eventually occur. You and any other living organism whose body water vapor content has dropped below the optimal level required to maintain healthy body functions is considered dehydrated.
Sharon Kleyne and research center colleagues at Bio-Logic Aqua® Research Water Life Science® have discovered that dry eye is a dehydration disease resulting from accelerated evaporation. The specific role of evaporation in dry eye is explained in the accompanying excerpts from Tear Film and the Treatment of Dry eye Disease, by William D. Mathers, M.D., a continuing education course for pharmacists sponsored by RxSchool.com and Bio-Logic Aqua® Research Water Life Science®. The sections in the book on misting and evaporation were based on unpublished research conducted by Dr. Mathers at Oregon Health and Sciences University – Casey Eye Institute.
Role of evaporation in tear film maintenance
All liquid-to-gas interfaces, according to Dr. Mathers, have a vapor pressure that is temperature dependent and controls the rate of the liquid-to-gas transition. Water, therefore, evaporates into the air until the vapor pressure equilibrates and the air is saturated. This is achieved only when the humidity reaches 100%, which rarely occurs. The surface of the eye (which is 99% water) is subject to evaporative loss that would include the total normal tear production if the surface were not protected by the lipid (oil) layer. A normal lipid layer reduces evaporation extremely effectively, by 95%, and keeps the eye wet.
Evaporation from the ocular surface, Dr. Mathers explains, can be measured by isolating the air around the eye and monitoring the rise in relative humidity. Evaporation will cause the humidity to rise and the rate of rise reflects the evaporation rate. The normal rate of evaporation from the surface of the eye is 15 x 10-2 grams/cm2/second. This was determined from Dr. Mathers’ work, but there has been reasonable agreement between most research groups that have investigated evaporation. A normal tear film evaporation rate is the equivalent of 0.15 microliters per minute. This amounts to 36% of the combined total of tear flow and evaporation in a normal subject, by Dr. Mathers’ estimation. The normal eye loses a relatively small amount to evaporation.
Evaporative dry eye
Evaporation is an important cause of dry eye for two reasons:
1. Some environments are very dry such as deserts, winter air heated to room temperature and airline cabins. Liquid water is most likely to evaporate in the presence of dry air, warm temperatures and wind.
2. Evaporation rates can increase dramatically in some subjects with meibomian gland dysfunction (which produces the lipid layer).
The surface of the eye would quickly dry out were it not for the protective effect of the lipid layer that reduces evaporation. In the normal eye, only a small percentage of tear production evaporates, but in dry eye this can increase to include nearly the total amount produced. Subjects with dry eye that have had both upper and lower punctum occluded usually do not suffer from epiphora (tearing) because all their tears either evaporate or are absorbed by the conjunctiva.
Kleyne, host of the nationally syndicated radio program, The Sharon Kleyne Hour Power of Water, Global Climate Change and Your Health on VoiceAmerica sponsored by Nature’s Tears® EyeMist®, wants everyone to take the time to understand these facts shared by Dr. Mathers. Vision is a precious gift. All of us need to be proactive about our ocular health and we need to know the facts in order to do that well.
How much of this information did you already know about dry eye disease? What steps have you taken to take care of and improve your eye health? you ever tried Nature’s Tears® EyeMist® or known someone who has done so to hydrate the eyes? What’s the verdict?
If you have a comment about this story or have stories you’d like to share, why not get involved? We’d like very much to hear from you! You can reach us in the following ways. Sharon@biologicaquaresearch.com 800-367-6478 ~ Fax 541-474-2123 http://www.naturestears.com or on Twitter at @sharonkleynehr