When matching discount prescription glasses, the material, shape, color of the frame, refractive index, film layer, function, and so on of the lens are all important.
Optometry is the most important step in fitting discount eyeglasses online, without exception. The results of the optometry are inaccurate. Even the most beautiful frame or expensive lens is useless. It is necessary to understand the precautions before optometry.
Do not drink alcohol, stay up late (including those who travel long distances and work night shifts), maintain sufficient sleep (8 hours or more), stay away from electronic devices such as mobile phones and computers before going to bed, and avoid eye fatigue during eye exams. Try to have an eye exam in the morning and avoid an eye exam at night.
Be responsible for your cheapest eyeglasses online. There are some requirements to make a new pair of glasses directly based on the old lens data without optometry. So the question is, is your old prescription correct? Even if you were right before, can you guarantee that the degree of your eyes has not changed now? So, when fitting glasses, don't say to follow the original prescription, at least one examination is beneficial and harmless.
The processing of lenses is carried out according to the optometry document, and the data includes right eye degree, astigmatism, axial position, left eye degree, astigmatism, axial position, binocular pupillary distance, pupillary height, purpose, etc. When taking the lens, it is required to check the data once to determine which part is not suitable (including forward tilt angle, pupillary distance, nose pad, overall level, etc.), and adjust it to satisfaction.
If you can pay attention to the above, the glasses you are wearing at least have some technical guarantee. I hope every friend can wear a pair of clear, comfortable, and long-lasting glasses.
