How To Use Contact Lens Correctly?
It is not recommended to use contact lenses when they are dry. Because when they are dry, even the nursing vacuole is used, the parameters change. It will affect the comfort of wearing, so it is recommended to replace the new lens. After the nursing liquid is used every time, you should cover the lid tightly. Do not touch the mouth of the bottle with your hand. If expired and unused, it should be discarded and replaced with new nursing fluid. As for your discomfort, you should return to the store for inspection.Contact lenses and glasses should be used interchangeably.
What Glasses Lens Thickness Should I Choose?
In this section, we will show you how to choose glasses lens thickness. Lens thickness will depend on the strength of your prescription, your pupillary distance, the size of the frame and the lens material. Usually, high prescription glasses are thick.
If you have moderate nearsightedness, you should choose thinner lenses at the edge thickness of your lenses will be more visible. If your sphere prescription is between -2.50 and -4.00, the lenses with a refractive index of 1.6 would be an ideal choice. A lens with a refractive index of 1.67 is suitable for sphere prescription between -4.00 and -6.00, and any prescription over that a lens with a refractive index of 1.74 will be more suitable.
So, when you purchase prescription glasses, consider the glasses’ lens thickness also. If you want to get a pair of prescription glasses online, Koalaeye Optical is recommended. It is an online optical store and provides all kinds of eyeglasses, sunglasses and frames. Besides, these glasses are stylish and cheap. If you purchased, the glasses will be mailed to you with great convenience.
What to consider when buying eyeglasses?
The size of the frame should match the pupil distance so that the edge thickness of the lens is thinner and more comfortable to wear. The size should be proportional to the size of the face. The upper edge should not be higher than the eyebrow and the eyebrow should not be visible in the lenses. The shape of the frame should match the shape of the face and skin tone to meet aesthetic requirements. The rectangular face should choose a circular arc or arc transition frame. An inverted triangle face shape should choose one with a lower wide edge.
Why do blue light glasses turn yellow?
The glasses are used for a long time. Blue lenses are usually light yellow. If the yellow is too deep, the resin lenses will oxidize and become yellow due to the long-wearing time. The lenses need to be replaced in time. Yellowing of the lens is related to the excessive secretion of facial grease, which leads to yellowing of the lens. The most direct way is to replace the lens glass.
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Choose clear glasses with the right materials for kids.
A critical point for children to choose frames is to think about the weight, to avoid wearing for a long time, or they will be uncomfortable, unstable, easy to slip. It is recommended to choose an ultra-light plate or TR90 lens frame, which has good chemical properties, good thermal stability, with no deformation, good recovery, and no side effects, lightweight, and convenient material.
Why do people like wearing rimless glasses?
Suitable for a Variety of Face Shapes. The rimless glasses can perfectly present the lens without the wrapping of the frame, hence, they are very ornamental. Rimless glasses work on all face shapes, even if you have a heart-shaped face, a round face, a square face, or the enviable oval face. Compared with thick-rimmed glasses, rimless glasses do not cover too much face shape and can show the wearer's style and temperament. People with small faces will have a better wearing effect.