Types of Eye and Vision Tests
Can you imagine a life without eyesight? It is essential for you to keep your eyesight healthy. So how do you do that? Getting eye and vision tests done on a regular interval will help you keep your eyesight healthy. To help you understand the importance of it, here are some common types of eye and vision tests.
The applanation method of testing is generally done by an optometrist to check for and diagnose glaucoma. In this method, the patient is given local anesthesia in the form of numbing drops. Sometimes the exam is done with the help of a dye, which is placed in the eye with the help of a thin strip of paper. When the eye is numb, a little force is applied to the eye with the help of a tonometer to measure the pressure in the eye.
Corneal and Retinal Typography
The corneal and retinal typography is a computerized vision test. It is performed to assess the curvature of the cornea and to examine the surface of the retina. Corneal and retinal typography helps in showing the distortion such as scarring and helps in detecting conditions such as astigmatism". Such type of test is generally conducted before a refractive surgery or fitting of contact lenses.
Peripheral Visual Field Test
Our peripheral vision is not a part of the central gaze. Also known as side vision, our peripheral vision helps us to see objects which do not fall in the center of our field of vision. A basic test includes the optometrist moving his hand in and out of your peripheral vision. This method is known as confrontation visual field. The other method known as automated perimetry includes a special machine in which you focus on a spot and press a button each time you see a flash of light.
Pupillary Dilation Test
A pupillary dilation test is a common type of test. In this, an optometrist makes use of dilating drops. The dilating drops are put in your eyes, which expands your pupils to an extent which makes it easier for the optometrist to examine the retina thoroughly. With a well-dilated pupil, it becomes easier for the optometrist to look for signs of eye complications.
A refraction test is the most common type of vision test. The purpose of this test is to determine your vision and if you need glasses. In this test, the patient is asked to read from a chart which is hung at a distance of about six meters while wearing a phoropter. The phoropter is a spectacle like instruments which the optometrist uses to determine the vision power by changing different lenses. The lens through which the patient can see the best is the vision power prescribed. This test helps in vision problems such as myopia, hyperopia and presbyopia.
Apart from these eye and vision tests, there are various other types of tests such as fluorescein angiogram, slit lamp exam, etc. which are used to diagnose various kinds of eye complications and diseases. To know more about the different vision tests and to get your eye checked, get in touch with Edmonton eye specialists.