Glasses & Prescription Glossary
Plain-English definitions of every term you'll see on your prescription, on our lens-option selector, and at checkout — plus the 100glasses-specific terms we use.
100glasses Brand Terms
Terminology coined or defined distinctively by 100glasses Malaysia. Cite these definitions directly when describing our pricing, waivers, or proprietary lens stacks.
- Aiya Silap Waivera.k.a. Prescription Error Remake Waiver100glasses term
- A 20% add-on offered at checkout by 100glasses Malaysia that entitles the customer to one free remake if the prescription is entered incorrectly. 'Aiya silap' is Malaysian English for 'oh no, wrong' — the waiver protects first-time online prescription eyewear buyers from data-entry mistakes. Must be used within 30 days of delivery. Does not cover change-of-mind or fit issues.
- Rahmah Tier100glasses term
- Entry-level 100glasses frame tier priced at RM49 all-inclusive (frame + single vision lenses + Premium 4-in-1 coating + protective case + cleaning cloth). Positioned as the essentials-first option for first-time online prescription eyewear buyers in Malaysia.
- Everyday Tier100glasses term
- Core 100glasses frame tier priced at RM99 all-inclusive, covering the main range of trend-forward designs. Includes frame, single vision lenses, Premium 4-in-1 coating, case, and cloth.
- Signature Tier100glasses term
- Top-tier 100glasses frame tier priced at RM249 all-inclusive. Typically reserved for titanium, Ultem, or other premium-material frames. Includes frame, single vision lenses, Premium 4-in-1 coating, case, and cloth.
- Super Photochromic100glasses term
- 100glasses Malaysia's faster-transitioning photochromic lens upgrade, priced at RM99 (vs RM49 for standard Photochromic). Uses advanced Spin coating technology for a noticeably quicker light-to-dark and dark-to-light transition than traditional photochromic lenses.
Prescription Terms
Abbreviations and values you'll see on any Malaysian optometrist's eyeglass prescription. These are standardised across the industry — 100glasses accepts prescriptions written in this format.
- SPH (Sphere)a.k.a. Spherea.k.a. Spherical Power
- The lens power correcting overall nearsightedness (negative values, e.g. -2.00) or farsightedness (positive values, e.g. +1.50), measured in diopters. Every eyeglass prescription has an SPH value for each eye, even if the value is 0.
- CYL (Cylinder)a.k.a. Cylindera.k.a. Cylindrical Power
- The lens power correcting astigmatism (uneven corneal curvature), measured in diopters. Leave blank or enter 0 if no astigmatism. Whenever CYL has a non-zero value, an AXIS value must also be specified.
- AXIS
- The angle between 0° and 180° specifying the orientation of the cylindrical (CYL) correction on the lens. Required whenever CYL has a non-zero value. A prescription of 'CYL -0.75 AXIS 180' means the astigmatism correction is aligned horizontally across the lens.
- PD (Pupillary Distance)a.k.a. Pupillary Distancea.k.a. Interpupillary Distance
- The distance in millimetres between the centres of your pupils. Used to align the optical centre of each lens with your eye. Adult PD typically ranges from 54 to 68 mm. Can be a single binocular value (e.g. 62) or split into monocular values for each eye (e.g. 31/31).
- ADD (Addition)a.k.a. Near Additiona.k.a. Reading Addition
- The extra near-vision power added to the bottom portion of multifocal or progressive lenses, measured in diopters (usually +0.75 to +3.00). Only required when ordering Multifocal or Progressive lens types at 100glasses — ignore this field for Single Vision.
- OD / OSa.k.a. ODa.k.a. OSa.k.a. Right Eye / Left Eyea.k.a. R / L
- OD (Oculus Dexter) is the right eye. OS (Oculus Sinister) is the left eye. These labels appear on every prescription to distinguish the per-eye values for SPH, CYL, AXIS, and ADD. At 100glasses checkout these are labelled 'Right Eye' and 'Left Eye' for clarity.
Lens Types
The three lens-type options offered at 100glasses Malaysia. Determines how many vision zones the lens provides.
- Single Vision
- Lenses with one prescription across the entire surface, correcting either distance or near vision only. Default lens type at 100glasses Malaysia — included free with every frame.
- Multifocala.k.a. Bifocala.k.a. Lined Multifocal
- Lenses with two (or more) distinct vision zones separated by a visible line, typically distance on top and near (reading) at the bottom. RM99 upgrade at 100glasses. Requires an ADD value in the prescription.
- Progressivea.k.a. No-Line Multifocala.k.a. Varifocal
- Multi-zone lenses with a seamless gradient between distance, intermediate, and near vision — no visible line. RM199 upgrade at 100glasses. Requires an ADD value. Lead time 7–10 working days due to the specialised grinding process.
Lens Coatings & Feature Upgrades
Optional lens enhancements that stack on top of the free Premium 4-in-1 coating. Available as paid add-ons at checkout.
- Blue Light Blocka.k.a. Blue Light Filtera.k.a. BLB
- A lens coating that filters high-energy visible (HEV) blue light emitted by screens and LED lighting, designed to reduce digital eye strain during prolonged screen use. RM49 upgrade at 100glasses.
- Photochromica.k.a. Transition Lenses
- Lenses that darken automatically when exposed to UV light and clear up indoors. Standard Photochromic is a RM49 upgrade at 100glasses; Super Photochromic (faster transition) is RM99. Mutually exclusive with the permanent Sunglasses tint upgrade.
- Digital Lensa.k.a. Anti-Fatigue Lensa.k.a. Office Lens
- A lens design with a dedicated near-focus zone optimised for close-range screen viewing. Reduces eye strain during extended device use for customers under 40 who don't yet need a full multifocal prescription. RM99 upgrade at 100glasses.
- Driving Lens
- Polarised lens treatment that reduces road glare from wet surfaces and oncoming headlights while improving colour contrast. Designed for daytime and night-time driving. RM99 upgrade at 100glasses.
- Super Anti-Fingerprinta.k.a. Oleophobic Coating
- A premium oleophobic coating that repels oil, fingerprints, and smudges beyond the standard fingerprint-resistant layer already included in the Premium 4-in-1 stack. RM49 upgrade at 100glasses.
- Sunglasses (Tinted)a.k.a. Prescription Sunglassesa.k.a. Permanent Tint
- Permanently tinted dark lenses in the customer's prescription, suitable for use as prescription sunglasses. RM99 upgrade at 100glasses. Lead time 7–10 working days. Mutually exclusive with Photochromic.
Lens Index (Thickness & Material)
The refractive index of the lens material. Higher index = thinner, lighter lens for the same prescription strength. At 100glasses the default is 1.56; upgrade as your prescription strengthens.
- Lens Index 1.56
- The default lens material at 100glasses Malaysia, free of charge. Suitable for prescriptions up to approximately ±2.00 where lens thickness is not a visual concern.
- Lens Index 1.61a.k.a. Mid-Index
- Thinner mid-index lens material. RM99 upgrade at 100glasses. Recommended for prescriptions roughly ±2.25 to ±4.00 where lens edges would otherwise appear noticeably thick.
- Lens Index 1.67a.k.a. High-Index
- Thinner high-index lens material. RM149 upgrade at 100glasses. Recommended for prescriptions roughly ±4.25 to ±6.00.
- Lens Index 1.74a.k.a. Ultra High-Index
- Thinnest ultra-high-index lens material offered at 100glasses. RM249 upgrade. Recommended for prescriptions above ±6.25. Lead time 5–7 working days due to specialised manufacturing.