osmolarity of tears

Osmolarity means density. Density should be at a normal level, not too little or too little. With the decrease in the amount of mucin, filamentous filamentous structures are formed. The increase in density and decrease in tears causes damage to the corneal epithelium and susceptibility to infection.
The osmilarity of the tear is around 303-305 mosm/L. After 316, it is considered as an excess of density.
The density should be at a normal level. The decrease in the water (aqueous) amount of the tear increases the osmolarity. That is, the tear becomes dense, sedimented, sticky, vision deteriorates, toxic substances and residues are not thrown out of the eye.

Why does the aqueous decrease?

*Reduced blinking reduces aqueous. The reason for this is looking at the computer and mobile phone for a long time, reading for a long time. Blinks, which are around 28-30 per minute, decrease to 7-8. Remember, when you blink, tears are released.

*Hot environments, air conditioners, and summer months cause aqueous loss.

*Contact lens is the most serious cause of dry eye, it increases tear density. As the water content in the contact lens increases, it absorbs the water from the eye like a sponge. Lenses with a low water content should be used.

*Dozens of systemic diseases reduce aqueous production.

Rheumatic diseases (rheumatoid arthritis and others) Diseases such as sjogren’s syndrome diabetes thyroid disease, systemic lupus and polymyositis reduce aqueous production.

*Some eye surgeries reduce aqueous. Laser application to the eye to remove the glasses is the most serious cause of dry eye. The second is cataract surgery.

*Some oral systemic drugs reduce aqueous. These are the drugs that you have to use constantly, be sure to see the introduction in the box. Anti depressants, birth control pills ,some blood pressure lowering drugs ,some allergy and acne medications, Parkinson’s medications..

*The diet that causes fluid loss from the body reduces aqueous. Such as caffeine, alcohol, excessive tea, cigarettes, cola and carbonated drinks, chips…

*Aqueous loss: It is necessary to keep aqueous in the eye for a certain period of time. If the mouth of the meibomian gland is clogged with oil residue, the oil does not meet with the aqueous, it flows or evaporates immediately.

Are you aware, we are always talking about the increase in density due to the decrease in aqueous. The decrease in density, that is, the abundance of tears, is the case in the obstruction of the lacrimal sac, but the tear leaves the eye by flowing out of the lids, not through the duct.

If the tear does not leave the eye, infection develops. You can think of it as polluting standing water, and it is still harmful to the eyes. What to do? It should consider the case from multiple perspectives. There is a lot of work to be done, the first thing to do is to open the mouth of the oil gland with special processes. Will teardrops save the situation? No. It leaves the eye in 5-6 minutes. Teardrops are a distraction treatment.

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