A Pair Lenses Multi-Focal Progressive + Photochromic Lens Aspheric Prescription Myopia Glasses Presbyopia 1.56 & 1.61 & 1.67

This is Progressive + Photochromic

Eyeglasses Lenses

1 pair means 2 pcs

Because the lenses are customized according to your prescription

The production time of the lens usually takes 3-8 days.

Then we insert the lens into the frame

So, we will send it to you within 4-10 days after you pay the order.

Photochromic lenses are optical lenses that darken on exposure to specific types of light of sufficient intensity, most commonly ultraviolet (UV) radiation. In the absence of activating light the lenses return to their clear state. Photochromic lenses may be made of glass, polycarbonate, or another plastic. They are principally used in eyeglasses that are dark in bright sunlight, but clear in low ambient light conditions. They darken significantly within about a minute of exposure to bright light, and take somewhat longer to clear. A range of clear and dark transmittances are available.

In one sort of technology, molecules of silver chloride or another silver halide are embedded in photochromatic lenses. They are transparent to visible light without significant ultraviolet component, which is normal for artificial lighting. In another sort of technology, organic photochromic molecules, when exposed to ultraviolet (UV) rays as in direct sunlight, undergo a chemical process that causes them to change shape and absorb a significant percentage of the visible light, i.e., they darken. These processes are reversible; once the lens is removed from strong sources of UV rays the photochromic compounds return to their transparent state.

From Wikipedia, the free encyclopedia

Dear customer, please note your data here

1. No astigmatism

2. Astigmatism

prescription EXAMPLE format

have astigmatism

R(OD):SPH:-1.75, CYL:-1.5, AXIS:174, ADD:+1.75

L (OS):SPH:-2.75, CYL:-0.75, AXIS:150, ADD:+1.75

PD:64

Purchase process of myopia glasses

2. Select your lens thickness according to your prescription

and add myopia lenses to your shopping cart.

3. Pay in the shopping cart

4. Provide your prescription to us as following

5.Next, hand it over to us

We will make myopia glasses for you (according to your prescription)

and send them to you, most countries 15-30 days delivery

Pupil distance

Pupil: refers to the two head, the distance between the two. if optometry time forgot to record, according to the below measurement (friends family or a person, accurate to the millimetre ruler)

Operation method

1. two people face to face. Distance of 30 cm, measured horizontally in front of 5 meters or meters away from a fixed object, the researchers measured the horizontal ruler attached to the root of the nose.

2. the measurement of the ruler zero scale is aligned with the right eye pupil center (or the right pupil edge), the eye pupil center (or left eye pupil edge) corresponding to the ruler scale observation, and record the data.

3. repeat step 2, measure 3-4 times. take the acerage, so the the conventional pupil distance test can be. the pupil distance if the acerage adult male is between 60-73 mm, and the distance between the adult female pupils is between 53-68 mm.

Warm tip: configuration glasses belong to product customization,the shop according to the user's optometry prescription to provide various photometric lenses, so consumers must provide true and accurate data, in order to ensure the quality of glasses configuration, if the false configuration data is provided, the shop not negative any responsibility. thank you for understanding!