Key Aspects of Prescription Glasses

Prescription glasses are categorized in various ways, such as O.D. and O.S., cylindrical, axis

Let’s first understand what these terms mean:

– O.D. and O.S. : O.D. stands for “Oculus Dexter,” which means the right eye, and O.S. stands for “Oculus Sinister,” which means the left eye.

– Cylindrical: Refers to the correction of astigmatism in the eye.

– Axis: Indicates the direction of the astigmatism.

What is Astigmatism?

Astigmatism is when the cornea or lens in the eye is not properly shaped. This causes the eye’s shape to change and light does not focus properly on the retina, leading to blurry vision. Astigmatism is a form of refractive error.

Symptoms of Astigmatism:

– Difficulty seeing both near and far objects clearly

– Frequent headaches

Causes of Astigmatism:

– Irregular shape of the cornea or lens

– Thinning or flattening of the cornea

Diagnosis: To diagnose astigmatism, you should consult an eye doctor. They will test your eyes and provide the lens prescription in diopters. If the prescription has a plus (+) sign, it indicates farsightedness, and a minus (-) sign indicates nearsightedness. For example, +5.00 means farsightedness, and -5.00 means nearsightedness.

Different Types of Lenses:

– Single Vision: Corrects either near or far vision.

– Bifocal: Corrects both near and far vision.

– Trifocal: Contains three zones of vision: near, intermediate, and distance, often useful for tasks like using a computer.

– Progressive: These lenses do not have a visible line like bifocals and provide a smooth transition for near, intermediate, and far vision without the dividing lines found in bifocal lenses.

Note:  We hope you now have a better understanding. Now, you can order the glasses you need through our website.  

Link: [https://www.visionaryie.com/]

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