Step by Step Instructions
Maskoptix Fits All Full Size Masks
Measure
📏 How to measure:
- Use a ruler or caliper from edge to edge inside the skirt where your eyes will be.
- If the inside width is 119 mm or greater, all Maskoptix eyeglasses will fit.
💡 If your mask is smaller than 119 mm, please use this guide: https://maskoptix.com/pages/prescription-eyeglass-dive-mask-fit-guide
Example: 50‑20
Frame Size
- Lens Width (50) → width of one lens in millimeters
- Bridge Width (20) → space between the lenses
📌 How to find these numbers:
- On your current glasses: look at the inside of the temple arm.
- From your existing frame prescription or sizing guide.
- Ask your optical provider to measure.
✔️ Once you know these three numbers, choose a Maskoptix frame that matches the best combination for your comfort and mask fit.
Choose Lens Type
Single Vision
✔ Corrects distance or near only
✔ Good for divers who only need one prescription
Lined Bifocal
✔ Correction for both near and distance in two zones
✔ Great for reading gauges and seeing underwater
Progressive
✔ Seamless correction from near → intermediate → distance
✔ No visible line in the lens
✔ Best for multi‑task divers
💡 Suggested Frames for Bifocal & Progressive Lenses:
We recommend choosing a larger style frame like the EAB‑21 for better optical clarity and comfortable reading zones.
Choose Lens Coatings
Maskoptix offers advanced lens coatings and finishes to improve dive performance and durability.
- Anti‑scratch coatings
- Anti‑reflection layer
- Enhanced contrast for underwater visibility
