Ray-Ban RB8317CH ( Polarized )

Lens Thickness (Index)

1. 1.56 Normal 

• Medium Index 1.56 MC + UV400 + EMI

2. 1.61 Thin

• High Index 1.61 MC + UV400 + EMI + Aspheric

3. 1.67 Very Thin

• High Index 1.67 MC + UV400 + EMI + Aspheric

4. 1.74 Super Thin

• Super High Index 1.74 MC + UV400 + EMI + Aspheric

Lens Protection

• MC = Multicoated ( Anti Reflection = AR )
• UV400 = 100% Ultraviolet Protection
• EMI = Electromagnetic Infrared Protection ( Computer screen protection )
• Aspheric = Lens with undistorted edge.

Lens thickness recommendation

• If your power is around -2.00, choose 1.56 index, it will be around 3mm
• If your power is around -4.00, choose 1.61 index, it will be around 3 to 4mm
• If your power is around -6.00, choose 1.67 index, it will be around 4 to 5mm
• If your power is more than that, choose thinnest lens, 1.74 index. It will be around 5mm to 8mm.

Lens Type

1. Clear

• Transparent Anti Reflection Lens.
• Suitable for all user.

2. Computer Lens 

• Anti Blue light lenses. It’s help to cut of harmful blue light.
• Suitable for all user especially digital gadget user.
• When you see through the lens, there will have slight yellowish base color due to blue light coating applied on the lens.

3. Photochromic Lens

• Transparent when you are indoor, changed to dark when you are outdoor exposed to sunlight.
• The Darkness of the lens is depends on how strong is the ultraviolet, the higher the ultraviolet, the darker the lens.
• Suitable for all user.

4. Computer + Photochromic Lens 

• Combined Both Function of Computer Anti Blue light and Anti UV changing color lens (Function of (2) & (3) Combined)
• Suitable for all user.
• Prevent not easily get cataract.

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1. Example of a Prescription Glasses Form : 

2. Pupillary Distance ( PD )

Your pupillary distance (PD) — the distance between your pupils

** Take Note ** Remember request from your optometrist / optician after your eye refraction.

3. After filled in Right and Left Prescription, Click ” Yes ” on the column of ” I confirm that the prescription provided are accurate for my eyes ” to proceed for Lens Selection.