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See The Light Montana

Visual Acuity

Optometrist in MT

Directory for the best eye doctor in Montana

Visual acuity measurements evaluate how clearly each eye is seeing. Find The Best Optometrist In Montana. Reading charts are often used to measure visual acuity. As part of the testing, you will read letters on charts at a distance and near. Find The Best Optometrist In Montana

The results of visual acuity testing are written as a fraction, such as 20/40. The top number in the fraction is the standard distance at which testing is done (20 feet). The bottom number is the smallest letter size you were able to read. A person with 20/40 visual acuity would have to get within 20 feet to see a letter that should be seen clearly at 40 feet. Normal distance visual acuity is 20/20. Find The Best Optometrist In Montana near me.

Preliminary Tests

An optometrist may first want to look at specific aspects of your visual function and eye health. Find The Best Optometrist In Montana Preliminary tests can include evaluations of depth perception, color vision, eye muscle movements, peripheral or side vision, and the way your pupils respond to light. Find The Best Optometrist In Montana near me.

Keratometry

This test measures the curvature of the cornea (the clear outer surface of the eye) by focusing a circle of light on the cornea and measuring its reflection. This measurement is particularly critical in determining the proper fit for contact lenses. Find The Best Optometrist In Montana near me.

Refraction

 

Refraction - eye doctor MT

Find The Best Optometrist In Montana

Refraction determines the lens power you need to compensate for any refractive error (nearsightedness, farsightedness or astigmatism). Use this directory to find the best eye doctor near you in Montana. Using an instrument called a phoropter, your optometrist places a series of lenses in front of your eyes. Use this directory to find the best eye doctor near you in Montana He or she then measures how these lenses focus light using a handheld lighted instrument called a retinoscope. Use this directory to find the best eye doctor near you in Montana. Your doctor may choose to use an instrument that automatically evaluates the focusing power of the eye. The lens power is then refined based your input on the lenses that give you the clearest vision.Use this directory to find the best eye doctor near you in Montana

This testing can be done without eye drops to determine how the eyes respond under normal seeing conditions. Use this directory to find the best eye doctor near you in Montana. However, an optometrist will use eye drops with patients who can’t respond verbally or when some of the eyes’ focusing power may be hidden. The drops temporarily keep the eyes from changing focus during testing.Use this directory to find the best eye doctor near you in Montana