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 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…
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…
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…
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…
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…
The testing of visual acuity in infants and children has been treated separately from the testing of adults because infants and children often can’t be tested with the same materials…
Anti reflection coatings minimize the reflection of one or many wavelengths and are typically used on the surface of lenses so that less light is lost. A simple coating can…
Spherical aberration is an optical aberration that occurs when all incoming light rays after passing through spherical surface end up focusing at different points . Lights rays that strike a…
Retinoblastoma is a cancer of the eye that is usually diagnosed by the age of 6 years, with the majority of these cases seen by age 3 year. The disease…