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Defects of the contact lenses

The most common defects of the contact lenses include: Damaged edge of the contact lenses Tearing or scratching contact lenses Inorganic

Dehydration of the contact lenses

Dehydrated contact lenses (drying) can occur especially at higher temperatures and when the air is dry, incomplete or irregular blinking, age or contact lenses. During dehydration varies…


Deposits on contact lenses are invisible to the human eye and are the most common cause of inflammation. Tear film forms protein…

Diagnostic contact lenses

These are the corneal or scleral contact lenses that serve as a locator for intraocular…

Diameter of the contact lenses

The diameter (DIA) is one of the parameters essential to selection of a suitable type of contact lens for a specific user. Contact lenses are divided into:


A dioptre is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in…

Discomfort with contact lenses

Discomfort while wearing contact lenses is not always caused by only wearing lenses or poor hygiene. Reason may be the use of pharmacological agents.

Diverging lens

Diverging lens (concave lens) is used for correction of myopia. Converts the parallel beam after passing through the…

Dry eye syndrome

A very common issue for contact lense users. The user has blurred vision. This problem arises most frequently as a result in loss of tears, but also due to the interaction of contact…

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