KERATOMETRY
Ophthalmometer or so called keratometer is a ophthalmic diagnostic instrument that measuring the curvature of the anterior surface of the cornea it’s an objective method .it was invented by the…
JACKSON CROSS CYLINDER
Jackson cross cylinder is a single low power lens, which is a combination of a plus cylinder and a minus cylinder of equal power with axis perpendicular to each other,…
Synoptophore
It is a useful orthoptics tool specifically for the diagnosing the subjective and objective angles of squint. This is the instrument that performs a comprehensive assessment of binocular vision by…
Types of Drugs used in Ophthalmology
In pharmacology, a pharmaceutical drug, also called a medication or medicine, is a chemical substance used to treat, cure, prevent or diagnose a disease or to promote well- being. …
WHAT KIND OF OBSERVATION DURING FUNDUS EXAMINATION
Funduscopic examination is a routine part of every doctor’s examination of the eye, not just the ophthalmologist’s. It consists exclusively of inspection. One looks through the ophthalmoscope which is simply…
Aqueous Humour
Aqueous humour is a clear, watery fluid that fills the anterior and posterior chambers of the eye. It is produced by the ciliary processes of the ciliary body, a structure…
Uses of OCT
Optical Coherence Tomography is a non invasive imaging test. OCT uses light waves to take cross section pictures of the retina. With OCT, an optometrists can see each of the…
PRINCIPLE OF LENSOMETER
Lensometry is an ophthalmic procedure that helps a clinician to either to assess the: Spherical power. Cylinder power. Cylinder axis. Optical center. Prism reference point. Adds in bi-, tri- and…
OCULAR MANIFESTATION OF SYSTEMIC INFECTIONS
The eyes are a window to the soul, and they can also provide important clues to the presence of systemic infections. Many infections can cause ocular manifestations, which are changes…
OPTICS OF THIN LENS
In optics, a thin lens is a lens with a thickness (distance along the optical axis between the two surfaces of the lens) that is negligible compared to the radii…
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