Glasses are one of the optimal solutions to help people with myopia have clearer vision. A suitable pair of glasses when the frame is aesthetic and the lenses are of good quality. How to wear glasses properly , what to note when choosing glasses, read the article below by Helios to know.
Should have eye exam and vision test
This is an extremely important step before you own a pair of glasses that match your nearsightedness. A standard vision test will usually include:
- Measured through an automatic refractometer, helping us determine the reference lens number.
- Using a vision mask, try different lens numbers while reading letters and characters on the screen.
- Wear the glasses for 15-30 minutes, practice looking near or far, and walk around to see how your eyes adapt.
- Re-examine with an optometrist and adjust your glasses if you experience any unusual symptoms (headache, dizziness, eye strain, etc.)
To ensure accuracy, you should have your eyes examined at specialized eye hospitals. At the same time, you should have regular follow-ups to adjust your glasses to suit your level of myopia to keep your eyes healthy. In cases of severe myopia with retinal degeneration, monitoring degenerative lesions in the fundus is very important for timely intervention such as adjusting work regimes, laser treatment of the fundus, etc.
See also:
- How to choose glasses to suit your face
- Big mistakes when choosing prescription sunglasses
Wear glasses with the right prescription
Many people tend to choose glasses with a lower prescription in the hope of forcing their eyes to train and thereby reducing their prescription. But no, this is a completely wrong way of thinking.
- When wearing glasses that are lighter than your current nearsightedness, your eyes will have to adjust more, causing your nearsightedness to increase rapidly, causing eye fatigue, eye pain, and constant squinting.
- Wearing glasses with the wrong prescription for long periods of time can cause serious eye diseases such as amblyopia and strabismus.
- Wearing glasses with the right prescription is an important factor in helping you improve your eyesight significantly.
Choose the refractive index appropriate to the degree of myopia.
The refractive index of a lens is a measure of the speed of light passing through a material. The refractive index is proportional to the density of the material. The higher the refractive index, the thinner the lens.
- 1.56 refractive index lenses are suitable for people with nearsightedness from 0 - 2.50
- Refractive index lenses 1.60 are suitable for nearsightedness from 2.50 - 3.50
- Refractive index lenses 1.67 are suitable for nearsightedness 3.75 - 7.00
- 1.74 refractive index lenses are suitable for nearsightedness above 7.00.
- People with mild myopia from 0.25 to 2.50 can still use refractive index 1.56, 1.60 or 1.67 depending on their needs.
- In addition, there are 2 special refractive indices: 1.53 (trivet material), 1.59 (polycarbonate material).
- Refractive index lenses 1.67 and 1.74 are made from MR material so they are very hard, suitable for screw-in frames (rimless).
Make sure the center of the lens matches the pupil.
Many people who go to get glasses have eye pain, eye fatigue, and headaches when wearing glasses and have to get them re-cut 2-3 times. The cause of this condition is that the center of the lens does not coincide with the pupil, causing accommodation to be disrupted. This happens during the vision test.
Therefore, when you go to measure your nearsighted eyes, you should carefully research the place where you will be cutting your glasses, go to an eye hospital/clinic or an optical store that is trusted by consumers. And when you try on the lenses before cutting, if you see signs of eye pain or fatigue, tell the doctor or the person cutting the glasses so they can make appropriate adjustments.
Choose quality glass
When choosing glasses, you must choose good lenses to both protect your eyes and help you feel comfortable when living, working and traveling.
- Anti-glare, anti-reflective
- Water resistant
- Scratch resistant
- Dustproof
- Anti-UV, blue light
