The anterior segment is the front third of the eye that includes the structures in front of the vitreous humour like the cornea, iris, ciliary body, and lens. The anterior segment suffers from several disorders, the most common being a cataract.
An OCT adapted to a slit lamp is used to measure the corneal radius and the central corneal thickness. Likewise, the depth and the volume of the entire anterior chamber can be determined by the surgeon.
A slit lamp with the help of a microscope is used by the examiner to view the eye at many times the magnification.
Since the microscope has a light source it can be swiveled to both sides. This light produces a slit-shaped, focused light beam that passes through the transparent parts of the eye. The surgeon moves this light beam slowly across the eye at the appropriate magnification. This helps the surgeon notice any changes in the cornea or the lens clearly.
Ophthalmologists and optometrists specialize in the treatment and management of anterior segment disorders and diseases such as
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Everything at the back of the eye lens is called the posterior segment. It consists of the vitreous body which is a jellylike substance that fills the interior of the eyeball behind the lens.