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Acidification of the tear film

Raising and lowering of the pH of the tear film occurs due to the retention of carbon dioxide (hypercapnia), which is formed as a result of the…

Adhesion of contact lenses

Perfect adhesion (adherence) to the cornea is necessary not only to maintain the contact lens in the eye, but to ensure hydration of the areа of the cornea, which is covered by the contact lenses…

Amblyopia

Amblyopia or lazy eye represents the diminishing of visual acuity of the eye without visible signs of eye disease. It is caused by the absence of a visual…

Aniridia

Aniridia is a complete or partial lack of iris. Sometimes coincides with nystagmus and

Anterier segment of the eye

The anterior segment of the eye presents the front third of the eye, which includes the cornea, anterior chamber, iris and…

Anti-Reflective (AR)

Anti-reflective coating can reduce eyestrain caused by glare and reflections and all this, thanks to the simplest form of anti-reflective coating that was discovered by Lord Rayleigh in 1886…

Aphakia

Aphakia is the absence of the lens of the eye due to surgical removal, a perforating wound or ulcer, or congenital anomaly. It causes a loss of accommodation, far sightedness (hyperopia), and a…

Application

Reasons for application of contact lenses can be divided into the following groups: Diagnostic – these are special hard contact lenses which help with…