What does counting fingers mean in ophthalmology?
The visual acuity (VA) of patients with very low vision is classified using the semiquantitative scale “counting fingers” (CF), “hand motion” (HM), “light perception” (LP), and “no light perception.” More quantitative measures would be desirable, especially for clinical studies.
What does a visual fields eye test tell you?
A visual field test measures how far the eye sees in any direction without moving and how sensitive the vision is in different parts of the visual field. This helps doctors to find certain types of injuries and disease, like glaucoma.
How do you do a finger count test?
− hold up your fingers at varying distances (5 metres, 4 metres etc. and record the vision as counting fingers (CF) at the maximum distance they can see between 5 and 1 metre, i.e. VA = CF 5m or VA = CF 1m. If the patient cannot count fingers at 1 metre, wave your hand and check if he/she can see this.
What happens if I fail my visual field test?
A loss of function in the lower visual field can point to problems elsewhere. This is usually associated with fibers of the upper retina or nerve head. An abnormal test result may suggest a problem with your central nervous system, or point to an undiagnosed health problem.
What does full to finger counting mean?
This diagnostic exam is also commonly known as the “finger counting” exam because the examiner may use his own fingers during the test. The fingers are either identified or counted, depending on the extent of the exam. First, both eyes will be tested (binocular) and then each eye will be tested separately.
What are the 4 visual quadrants?
Repeat step 4, testing all four visual quadrants of the left eye: Inferior temporal, inferior nasal, superior temporal, and superior nasal.
How can I test my vision field at home?
Hold the test grid right in front of you, 14 inches (35 centimeters) away from your eye. Look at the dot in the center of the grid, not at the grid pattern. While looking at the dot, you will see the rest of the grid in your peripheral vision.