Silicone nose pads that prevent glasses from slippingĮar pieces that wrap around the ear (cable temples) are recommended for children under 4 years. Spring-loaded frames that are less likely to be bent or warped Shatterproof and impact resistant lenses, especially for children who play sports Think about the features below when buying eyeglasses for children: If your child is old enough, let them play an active role in choosing their own glasses. Photograph used by permission of the National Eye Institute, National Institutes of Health Eyeglasses for children They are often used to correct astigmatism. These curve more in one direction than in the other. These lenses are used to correct farsightedness (hyperopia).Ĭylindrical lenses.
#Os od which is right and left plus
The numerical prescription in diopters is always marked with a plus (+) symbol. Used to correct farsightedness (hyperopia). These are thickest in the center, like a magnifying glass. These lenses are used to correct nearsightedness (myopia).Ĭonvex lenses. The numerical prescription in diopters is always marked with a minus (-) symbol. The type of lenses used in eyeglasses depends on the type of vision problem, and may include:Ĭoncave lenses. What are the different types of eyeglass lenses?
It has an additional measurement listed on the prescription as "add" to show the strength of the lens. This number measurement describes the direction of the astigmatism in degrees.īifocal is additional power in the lens. This number measurement shows the amount of astigmatism (an irregularly shaped cornea which causes blurring).Īxis.
This number measurement reflects how much nearsightedness or farsightedness.Ĭylinder. The eyeglass prescription may also have these measurements: This means the left eye (sometimes the abbreviation LE is used). OD (Oculus dexterous).This means the right eye (sometimes the abbreviation RE is used). When looking at an eyeglass prescription, you will see the following abbreviations: This measurement reflects the amount of power needed to focus images directly onto the retina. The lens power of eyeglasses is measured in diopters. They do this by adding or subtracting focusing power to the eye's cornea and lens. Like eyeglasses, contact lenses correct refractive errors. Contact lenses are worn directly on the cornea. Eyeglasses work by adding or subtracting focusing power to the eye's cornea and lens.Ĭontact lenses. They can also include blurring due to an irregularly shaped cornea (astigmatism). Refractive errors can include trouble seeing far away (nearsightedness or myopia) and trouble seeing close up (farsightedness or hyperopia). They are a frame that holds two pieces of glass or plastic, which have been ground into lenses to correct refractive errors. Eyeglasses are the most common form of eyewear used to correct or improve many types of vision problems. There are 2 types of lenses prescribed for correcting or improving vision. Medical Definition of OD (lens prescription) OD (lens prescription): Abbreviation of "oculus dexter." Latin for "right eye." (The words "dexterity" and "dextrous" derive from "dexter" since the right hand is usually more skillful than the left.) OS stands for "oculus sinister" which is Latin for left eye.Eyeglasses and Contact Lenses Lenses for correcting or improving vision Likewise, what does OD and OS stand for in medical terms? Medical Definition of OS (lens prescription) OS (lens prescription): Abbreviation of "oculus sinister." Latin for "left eye." By contrast, OD stands for "oculus dexter" which is Latin for the right eye. Occasionally, you will see a notation for OU, which means something involving both eyes. They are Latin abbreviations: OS (oculus sinister) means the left eye and OD (oculus dextrus) means the right eye.
When you look at your prescription for eyeglasses, you will see numbers listed under the headings of OS and OD. S stands for sinister, which means left, so OS means “eye, left” D stands for dexter, which is right, so OD means “eye, right” U is uterque, or both which means OU means “eye, both”Īlso asked, which eye is OD and which is OS?
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