PRESCRIPTION OF LVAs
According to WHO: Low Vision is visual acuity of less than 6/18 but equal to or better than 3/60, or/and a corresponding visual field loss to less than 20° in…
Causes of low vision
Low vision cause , before starting the discussion in very short, I tell you that , ~what is a low vision ?~How low vision effect in our daily life?Including with…
Complications of contact lens wear
As many as a 45million people in the country wear contact lenses to improve their vision. contacts are usually safe, but several serious complications can occur especially if proper care…
Contact lens fitting in keratoconus
Keratoconus is a non-inflammatory degenerative abnormal condition of the cornea which causes a conic deformity. It is usually bilateral and progressive. The thinning is mostly central and makes the cornea…
HYBRID CONTACT LENS
These lenses consist of an RGP center with asoft skirt edge. They combine the benefits of rigid lens optics,including better lens contraction and decreased aberrations, alongwith the comfort of a…
Care of Contact lenses
When the lens is received from the manufacturer it is sterile, so where does the infection come from? Clearly, most of the complications with contact lens are because of the…
Light
This is a fact that we cannot see any object in a perfectly dark room conclusively establishes the truth that light is necessary for the purpose of vision. Nature has…
Tear Film & Contact Lens Interaction
The precorneal tear film plays a major role in the maintenance of the functional integrity of the cornea. It protects, nourishes & lubricates the cornea. The cornea is made up…
DUOCHROME TEST
The initial Duchrome test, also known as the Bichrome test, consists of two directions, red and green. Color distortion, the basis of the experiment, occurs because different wavelengths of light…
Subjective Refraction
There are two methods of evaluating the refractive error of an eye: Objective refraction, (usually retinoscopy) where the result depends purely on the examiner's judgment to determine the optimum optical…
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