swimming goggles with snorkel Prescription Swim Diving Mask Dry Snorkel Set Adult Blue Goggles Myopia Nearsighted

swimming goggles with snorkel Prescription Swim Diving Mask Dry Snorkel Set Adult Blue Goggles Myopia NearsightedModel Number: diving mask M1395 and dry snorkel S 6153 Product Name: Professional Blue Prescription Nearsighted Diving Mask Dry Snorkel Set Item: Scuba Diving Mask M 1395 Prescription lenses are PC,Polycarbonate. Mask skirt: Silicone PVC Mask head strap: Silicone PVC Buckle: Auto clip buckle system Usage: Snorkeling Age: Adult Size: about 16*11cm Item: Dry Snorkel S 6153 Material of mouthpiece: Silicone TPR PVC Material of tube: PVC Design: Dry Top

Model Number: diving mask M1395 and dry snorkel S-6153
Product Name: Professional Blue Prescription Nearsighted Diving Mask Dry Snorkel Set

Item: Scuba Diving Mask M-1395
Prescription lenses are PC,Polycarbonate.
Mask skirt: Silicone / PVC
Mask head strap: Silicone / PVC
Buckle: Auto-clip buckle system
Usage: Snorkeling
Age: Adult
Size: about 16*11cm

Item: Dry Snorkel S-6153
Material of mouthpiece: Silicone/TPR/PVC
Material of tube: PVC
Design: Dry Top
Age: Adult

Color:  blue

Users: free diving, scuba diving, snorkeling, swimming

Features:
Won the design patent of diving goggles
High-definition polycarbonate lenses, good news for people with myopia;
Professional ergonomic design, widened silicone, comfortable fit, strong adsorption, strictly prevent water leakage, suitable for various face shapes.

Optical lenses available from –1.5 to –6.0 by increments of 0.5 (for nearsighted or myopia)

Package Included:
1 x diving mask
1 x snorkel

[degree selection]
No astigmatism
If your eyes do not have astigmatism, choose lenses according to your degree.

Example: Myopia is -5.0 degree,choose -5.0(-500) degree lenses.If myopia is -4.7 degree,choose -4.5(-450) degree lenses(There are no lenses with the same degree of myopia as you. Choose lenses with a lower degree of myopia than you.).

Has astigmatism

If the astigmatism of the eyes is high, please choose lenses that are -0.1 to -0.5 less than your myopia.
Because the refractive index of water is different, it is necessary to subtract 0.5(50) degrees to avoid excessive height, which will make people easily dizzy.

Example: Astigmatism is 1.0(100) degrees, myopia is 5.0(500) degrees, then 500-50=450 degrees, Then you can choose -4.5(-450) degree or -5.0(-500) degree lenses.