Refractive errors happen when the cornea of the eye is shaped differently from the normal circular form and cannot receive light rays properly. Vision errors include myopia or near-sightedness, hyperopia or far-sightedness and astigmatism, all of which can be treated by using prescription eye glasses, contact lenses or in some cases, eye surgery like LASIK […]

Tonometry is a kind of eye examination where a part of the cornea is observed to measure the pressure of fluid inside the eye. Tonometry is also called intraocular pressure (IOP) measurement or even a glaucoma test because it is usually done to detect glaucoma and begin preventive treatment before it results to blindness. Glaucoma […]

The pupilometer is actually two different opthalmic equipment devices that share the same name. One of the instruments measures the distance between each pupil of the eyes and the other is one that measures the response of the pupil to any kind of visual stimuli. The normal usage of pupilometer is pertaining to the ophthalmic […]

Pachymeter is a type of ophthalmic equipment that ophthalmologists or optometrists use to measure corneal thickness. Pachymetry is especially helpful to eye surgeons prior to ocular surgery using the ophthalmic surgical microscope, since it is important for them to see the cornea and the exact location in the eye where the adjustments should be made […]