An eye Specialist in Pender NE will subject his patients to a wide range of tests and procedures when examining their eyes. The tests go from the simplest, which is reading an eye chart to examining the inside of the eye using high powered lenses. A complete eye examination may easily take an hour or more all depending on the complexity of the tests that the eye Specialist in Pender NE feels are necessary to fully evaluate the health of your eyes and your vision.
Visual Acuity: This will usually be the first test performed and the objective is to determine how sharp your vision is. The test uses an eye chart which tests your long range vision and a small acuity chart which allows for a determination of your short or near vision.
Color Blindness: The eye Specialist in Pender NE usually completes the visual acuity test first because it also allows him to rule out color blindness. Color blindness is often a hereditary trait but the test can also alert the Specialist to eye problems that may have an effect on your ability to see colors.
Cover test: The simplest way for the eye Specialist in Pender NE to know how well your eyes work in unison with one another is to conduct a cover test. While you are intently focused on an object on the other side of the room, the Specialist will cover each eye alternatively while you continue staring at the object. The Specialist can assess if the uncovered eye has to move to maintain focus or to pick up on the target. This could be binocular vision which can cause eye strain.
Retinoscopy: During this test the lights are diminished and you will be told to focus on the big “E” on the eye chart. While you continue to stare intently the eye Specialist in Pender NE will shine a light into your eye and flip a series of lenses in front of your eyes. All based on the reflection of light from your eye, the Specialist can approximate your prescription.
Refraction: This is the first real test that the eye Specialist in Pender NE uses to accurately read your prescription. A machine with a series of lenses is put in front of your eyes. The machine is called a phoropter and the Specialist will ask you which combination of lenses gives you the clearest image. The Specialist will continue to “tweak” the lens power until the final prescription is established. Refraction is the test that determines near and farsightedness, astigmatism and presbyopia.
Autorefractors: An autorefractor may be used; it automatically determines the correct prescription. With your chin resting on a stand, you look at a pin prick of light. These devices are often used with children who find it hard to sit still during refraction; they are very accurate and can give the eye Specialist in Pender NE the prescription in seconds. Visit the website for more information.