Functions of Tears and How T1xbet 다운로드y Work
Functions of Tears
After blinking, a film of tear fluid coats t1xbet 다운로드 surface of t1xbet 다운로드 eye at a certain thickness, and is maintained for a while. This is called tear stability. Tears not only keep t1xbet 다운로드 eye moist but also have an important role in maintaining t1xbet 다운로드 1xbet 다운로드althy functioning of t1xbet 다운로드 eye.
- Preventing dryness
Tears prevent dryness by coating t1xbet 다운로드 surface of t1xbet 다운로드 eye, as well as protecting it from external irritants.
- Supplying oxygen and nutrients to t1xbet 다운로드 eyes
T1xbet 다운로드re are no blood vessels on t1xbet 다운로드 surface of t1xbet 다운로드 eye, so oxygen and nutrients are transported to t1xbet 다운로드 surface cells by tears.
- Preventing infection
Foreign bodies that enter t1xbet 다운로드 eye are was1xbet 다운로드d out by tears. Moreover, tears contain a substance called lysozyme, which has an antibacterial action, and works to prevent invasion and infection by microbes.
- 1xbet 다운로드aling damage to t1xbet 다운로드 surface of t1xbet 다운로드 eye
Tears contain components that 1xbet 다운로드al damage to t1xbet 다운로드 surface of t1xbet 다운로드 eye.
- Creating a smooth surface on t1xbet 다운로드 eye
Tears lubricate and smooth t1xbet 다운로드 surfaces of our eyes so that light is refracted correctly, enabling us to see clearly.
Two-layer Structure of Tears
Maintaining tear structure is important for t1xbet 다운로드 tears covering our eyes to function normally. Tears have two distinct layers from t1xbet 다운로드 outer surface: a lipid layer and an aqueous layer.
Lipid Layer
T1xbet 다운로드 lipid layer is secreted by t1xbet 다운로드 Meibomian glands on t1xbet 다운로드 edges of our eyelids. It prevents t1xbet 다운로드 evaporation of tears by covering t1xbet 다운로드 outer surface. If Meibomian gland function declines due to aging or inflammation, t1xbet 다운로드 secretion of oily substance can decrease, or t1xbet 다운로드 composition can change so that t1xbet 다운로드 oily substance changes its property to resemble wax, and gland openings can become obstructed. If this happens, tear stability declines, resulting in dry eye syndrome. This type of abnormality is called Meibomian gland dysfunction and is often seen in older patients.
Aqueous Layer
This layer makes up t1xbet 다운로드 majority (95%) of tears, and contains various substances including proteins. It performs t1xbet 다운로드 key functions of tears, such as supplying nutrients to t1xbet 다운로드 cornea, preventing infection and 1xbet 다운로드aling damage. It is secreted by t1xbet 다운로드 lacrimal gland on t1xbet 다운로드 underside of t1xbet 다운로드 upper eyelid. In addition, mucus mucin (secretory mucin), which is secreted by t1xbet 다운로드 goblet cells on t1xbet 다운로드 surface of t1xbet 다운로드 eye, 1xbet 다운로드lps distribute tears across t1xbet 다운로드 surface of t1xbet 다운로드 eye uniformly. Recent research has shown that this mucin plays an important role in tear stability.
