Many people don’t know what they should expect when going for eye exams, especially comprehensive ones. Your eye doctor carries out several tests to examine your eyes. The eyes tests range from simple physical tests such as reading an eye chart to using a high-powered test to visualize the tiny structures in your eyes.
A comprehensive vision exam takes an hour or more, depending on the complexity of the number of tests you optometrist has to carry out.
Below are some of the tests your doctor can carry out to evaluate the vision and health of your eyes:
When performing a color blindness test, your optometrist can use a chart and ask you to identify colors and their different shades. Also, the doctor can ask you about any cases of color blindness in your family since color blindness can be hereditary.
Visual acuity is among the first tests that your eye doctor carries out during a comprehensive eye exam in Chevy Chase. The visual acuity test aims to measure the sharpness of your vision.
Your eye doctor will use a projected eye chart to measure your distant visual acuity. For near vision acuity, your Chevy Chase optometrist will use a handheld eye chart. When you are nearsighted, you can portray signs such as blurred vision and eye strain.
An ocular motility test involves determining how well your eyes can follow a moving object. When performing the test, the optometrist will have you hold your head still then follow a hand-held light or object.
When testing quick eye movements, your doctor will have you move your eye back and forth between two target positions. Some of the issues associated with lazy eye movements include low reading ability and poor vision when playing sports.
To check if your eyes coordinate well, your eye doctor can consider a cover test. When carrying out the cover test, the optometrist will have you focus on a small object across the room. The optometrist will then cover one of your eyes alternately as you stare at the object.
The cover test aims to determine whether your covered eye to get a fixation target. If your eyes must move for the other one to pick up a fixation target, it could indicate you have Strabismus or amblyopia.
A retinoscopy procedure is a test that determines the need for eyeglasses. When carrying out the retinoscopy procedure the optometrist will dim the lights in the room and ask you to focus on a big target on the eye chart.
As you focus on the big “E” on the eye chart, your eye doctor will shine a light, and flip lenses on a machine infront of your eyes. The test aims to determine which lens power will be best to correct your distance vision.
To determine your exact eyeglass prescription, your eye doctor uses a refraction test. During the refraction test, your doctor will put a phoropter in front of your eyes and show a series of lens choices. The doctor will then ask you which two lenses in the series seemed clear.
According to your answer, your optometrist can continue fine-tuning the lenses until you reach the final eyes glass prescription. The refraction test helps in determining your farsightedness, nearsightedness, astigmatism, and presbyopia.
When testing for glaucoma, your doctor begins by measuring the pressure inside your eyes. During the comprehensive eye examination near you, the doctor will put your chin in a machine’s chin rest and puff a small burst of air into your eye.
Based on your eye’s resistance to the puff of air, the NCT machine calculates your intraocular pressure. If you have high intraocular pressure, you might be at risk of glaucoma.
A slit lamp is a microscope that your optometrist uses to examine the small structures of your eye under high magnification. At Chevy Case Eyecare, our optometrist will ask you to place your chin and forehead securely in front of the slit lamp and begin examining your eye structures.
Sometimes the doctor can use a hand lens together with the sit lamp to examine structures at the back of your eye. Using a sit lamp, the optometrist can identify eye conditions such as cataracts, corneal ulcers, and macular degeneration.