Wear contact lenses beyond the time determined by the ophthalmologist does, may cause pain, blurry view, Besides infections and corneal ulcers, serious changes that may even lead to blindness.
How long the lens can stay in the eye depends on the lens material and the characteristics of the eyes of the patient.
The use of contact lenses is bad for a long time because decreases corneal oxygenation. Because the cornea has no blood vessels, it needs to pick up oxygen from the air. Thus, the contact lens acts as a barrier to the passage of oxygen.
Although the materials of the contact lenses allow a good diffusion of oxygen, they are still a barrier. The greater the lens degree, thicker she is e the lower the oxygen passage.
This reduction in oxygenation may bankruptcy and even corneal cell death, which do not regenerate. In addition, cells on the surface of the cornea become impaired and begin to function inadequately.
This can lead to corneal inflammation (keratitis) and to promote the development of serious infections such as infectious corneal ulcer, caused by bacteria, fungi or amoebas. These people may have permanent sequelae in the vision and even require corneal transplantation.
Another reason why contact lenses should not be worn beyond the prescribed time is that they accumulate residues of proteins and bacteria, which can cause eye allergies and infections.
Does sleeping with contact lenses hurt?
Yes, sleeping with contact lenses is bad. Although there are disposable lenses that are approved for use during sleep, there is always a greater associated risk.
This is because contact lenses already decrease oxygenation of the cornea during the day when the eyes are open. During sleep, with the closed eyelids, That oxygenation It gets even more reduced.
Therefore, the most take contact lenses before bed to allow the cornea to breathe freely and not to enter into suffering, which could have serious consequences.
To avoid complications, throw away contact lenses when they reach the deadline determined by the manufacturer, even if they still look good, and do not wear the lenses beyond the set time by the ophthalmologist.
Discontinue use of contact lenses immediately and seek medical attention at the slightest sign of irritation, especially if there is redness, pain or blurred vision.