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What is segment height for progressive lenses?  Segment height for progressive lenses refers to the vertical distance from the bottom of your lens to the centre of your pupil.  How do you measure it? To measure your segment height, you need your glasses frames, a ruler and a mirror. Unlike pupillary distance (PD), segment height...

Blue ray exists everywhere today As the widespread use of smartphones, tablet devices and computers increases the time we face a screen, more and more people suffer from eyestrain symptoms. One cause of this is believed to be the blue light emitted from the display on such devices. Blue ray will cause diffusion and...

It will be quite easy to select eyeglasses if you are familiar with your face shape. Come here to simply recognize your face shape, and frames we recommended below can be perfect references for you!! An oval face has slightly wider cheekbones with a gentle curved jawline. ✅Almost every kind of eyeglasses frame look...

What Is Pupillary Distance(PD)? Pupillary Distance (PD) is the distance, in millimeters, between the center of one pupil to the center of the other. The PD is needed to manufacture your eyeglasses because it determines the exact optical center of the lens, which is the point where you look through the lens. STEPS TO...

NOTICE: When your myopia or hyperopia is higher than 6.00, we recommend you to choose a lens with an index greater than 1.61, otherwise it may cause discomfort when the lens is too thick or cannot be made. 1.56 Aspheric Lenses suggestion power: SPH: -0.50 ~ -4.00;CYL: -0.50~-2.00 SPH: +0.50~+4.00;CYL:+0.50~+2.00 1.61 Aspheric Lenses suggestion power: SPH:...