Buy 2 get 2 free- how it works

please only add 2 units in your shopping basket and make one payment for all of them ,you'll receive 4 units,

we're offer colors choice about free item,please leave message tell us,

otherwise we will ship randomly,hope you could understanding.

Item description：

These Pinhole glasses are suitable for adult or children with sight problem such as Myopia, hyperopia and astigmatism. When the eyes look through the small holes they naturally change focus relieving the eyeballs from there 

previous focus.

Features：

Assisting in the treatment of astigmatism, myopia, strabismus, and relieving eye fatigue to regulate various types of poor vision.

By using scientifically designed pinholes to filter out abnormal light and correct light sources entering the eyes, the eye muscles can easily function, not only improving blood circulation in the eyes, but also reducing eye fatigue and 

tension, and improving vision.

Suitable for both children and adults.

Wear for 15 minutes per day can help improve vision within 2-4 weeks.

Colors: Black,Yellow,Blue,Light Blue,Dark Blue,Red,Rose Pink,Wine Red, Purple,Dark Green,Light Green,White

Size: 141*143*50mm

Note: Due to manual measurement, there may be a slight error of 1-2mm

Package includes：

4 x Eye Relief Sunglasses