Everything to Know About Your Eye Prescription

Everything to Know About Your Eye Prescription

Eyecare is among the most important bits of wellness and overall health. When your eyes are not in their best shape, it becomes problematic to lead your best life. Thankfully, there are many qualified optometrists in Edmonton AB, who can tend to your eyes and offer you the best possible solutions. When it comes to eye prescriptions, the glasses you get should differ depending on the eye condition you have.

Prescriptions for Glasses VS. Contact Lenses

Glasses prescriptions in Edmonton AB are very different from prescriptions for contact lenses. You cannot use the measurements for glasses prescription for purchasing contact lenses, and vice versa. This is what makes the role of an optometrist near you important in your eye care.

Technically, you must consider that eyeglass lenses are worn about 11 or 12 millimeters from the surface of the eye. As for contact lenses, they are placed directly over the surface of the eye. In that case, the power and strength of eyeglasses are much different from that of contact lenses.

Usually, before you can opt for contact lenses, your optometrist has to perform a lens fitting. This fitting allows him/her to monitor the behavior of your eyes to the presence of the lenses.

Standard Eye Prescription Measurements

A lot is considered when prescribing lenses for a patient. Diopters have to be used for all eyeglasses prescriptions. They are used to measure power, ranging from sphere power and add power to cylinder power. These measures are necessary to offer the corrective treatment you need for a clear vision.

However, your doctor might add a couple more specifications. These specifications can cover either anti-reflective coating, progressive lenses, or photochromic lenses. These parameters further help you to purchase the best and right corrective eyeglasses for your condition.

The prescription for your lenses depends on how severe your eye condition is. The main parameters used in standard eye prescription include:

  • Added magnifying power – this parameter is emphasized for patients with presbyopia. Presbyopia is a condition that causes farsightedness, resulting from lost elasticity of the eye lens.
  • Cylindrical (CYL) measurement – this parameter is emphasized for patients who experience blurriness or distorted vision, a condition otherwise known as Astigmatism. It happens when light does not refract properly in the retina of the eye.
  • Spherical (SPH) measurement – this one is used as a parameter for nearsightedness or farsightedness
  • Axis – this parameter is used to control the direction of the astigmatism

The entire prescription utilizes all the parameters. However, the degrees thereof differ, depending on which eye condition is being treated.

Types of Lenses

When it comes to eyeglasses prescriptions, the type of lenses you get varies. This will depend on factors such as vision needs, lifestyle, job, and preferences. The different types of lenses include:

  • Single-vision lenses – if you have long or short sight, you may only need to wear glasses when reading or driving. Other than that, you can go without them. In such cases, these lenses are perfect for you to see far or up-close, depending on your needs. They provide eye correction for only one vision type.
  • Bifocal lenses – they encompass two vision types in one lens. For example, if you need vision correction to see a far object as well as near objects, these lenses are ideal. The upper part is set apart for distance while the lower part for reading. This will take away the need for having two different types of single-vision glasses.
  • Varifocal lenses – these are lenses suited for patients with multiple eye problems. They cover a variety of corrective measures. Such patients wear their glasses at all times. The lenses are made for far vision, near vision, and everything in between. The lenses change power from upper to lower, depending on your needs. It allows you to have a clear vision at all times without needing an extra pair of glasses.


When it comes to prescriptions of eyeglasses, there is no one-fits-all. Different eyes require different lenses. Besides, the corrective measures that need to be taken for your eye condition differ from other peoples. Other than that, the prescription is inclusive of your preferences and lifestyle. It is why it is important to consult your doctor before you dash off to purchase random glasses for your vision correction.

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