Understanding Eyeglass Prescriptions and the Types of Eyeglass Lenses

Eyeglass Lenses

Do not confuse an eyeglass prescription with a contact lens prescription, as they are not the same. When it comes to an eyeglass prescription, it is for the purchase of eyeglasses only. In contrast, a contact lens prescription contains certain information that can only be obtained during a contact lens consultation and fitting.

After an eye examination, the doctor gives an eyeglass prescription that contains certain things related to the individual’s eye. The doctor also mentions the types of visual problems, such as being nearsighted, farsighted, or astigmatism.

Importance of wearing eyeglasses

Wearing eyeglasses is important because people are extensively exposed to various digital devices like smartphones, laptops, ipads, smart TVs, etc. However, we did not notice that the extensive use of these digital devices leaves hazardous effects on our eyes and their eyesight. So if you notice some difficulties in seeing things clearly, you must contact an eye specialist for your eyeglass prescription.

The Terms Used in Eyeglass Prescription

There are abbreviations that a doctor mentions in the prescription after an eye examination. Some of the standard terms mentioned are;

Oculus Uterque (OU), (OD) and (OS):

Oculus Uterque is the Latin term for ‘both eyes’. This means that the visual problem resides in both eyes. OD for the right eye, and OS for the left eye. These abbreviations are a way of avoiding confusion for the doctors.

Sphere (SPH)

It indicates the power of the lens, measured in diopters (D). It is prescribed to correct a person suffering from nearsightedness or farsightedness. The negative or positive signs determine the difference between. For example, minus (-) before the number of the lens power suggests nearsighted, plus sign (+) indicates a farsighted prescription.

The Types of Eyeglass Lenses

Earlier, eyeglass lenses were available in only glass forms, but many hi-tech plastics are alternating the glass lenses with advances in technology. As a result, these modern eyeglass lenses are lighter, thinner, and more scratch-resistant than glass lenses.

Polycarbonate lenses

These lenses are impact-resistant and are an ideal choice for athletes and active people. Polycarbonate lenses also provide ultraviolet protection.

Trivex lenses

The characteristics of these lenses are similar to polycarbonate lenses; however, they are made from a new type of plastic. As a result, they are incredibly lightweight, thin, and impact-resistant and give a clear vision to the wearer.

High index plastic lenses

This type of lens has been designed for people who have really bad vision and require strong prescriptions. Unlike the usual thick lenses required in solid prescription glasses, these lenses are light and thin.

Aspheric lenses

These lenses are spherical. They consist of differing degrees of curvature over its surface, making the lens thinner and flatter than other lenses.

Photochromic lenses

The color of these lenses changes from clear to tint when exposed to sunlight. And it can be worn as a sunglass as well.

There are many reasons why to choose Nearest Charm Optical Stores. One of the main reasons is that our company is one of the oldest and most trusted running optical stores.

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