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From lens types to coatings, prescription reading to thickness — understand exactly what goes into your LensZee glasses.
Step 1
Your lens type is determined by what you need to correct and how you use your glasses.
A single vision lens has one focal power across the entire lens, correcting vision for one specific distance — either far, intermediate, or near. They are the most widely prescribed type of lens globally.
From Free — included in all LensZee prescriptions. Available in all four lens index options.
Varifocal lenses — also known as progressive addition lenses (PALs) — contain three seamlessly blended vision zones in a single lens with no visible lines. They eliminate the need to carry multiple pairs.
Distance
Driving, TV, outdoors
Intermediate
Computer screens, dashboard
Near
Reading, phones, close work
From £30 — available with all lens index options. ADD value required on your prescription.
Zero power lenses (also called plano lenses) have no refractive correction — they don't alter your vision. They're worn purely for protection, style, or reducing digital eye strain from screens.
Free — no prescription needed. Skip straight to the coating and checkout.
Step 2
The lens index measures how efficiently the material bends light. A higher index means thinner, lighter lenses — essential for stronger prescriptions.
Index 1.5
Free
Best for
Up to ±3.00
Index 1.6
£15
20% thinner than index 1.5
Best for
±3.00 to ±5.75
Index 1.67
£25
30% thinner than index 1.5
Best for
±4.75 to ±6.75
Index 1.7
£40
45% thinner than index 1.5
Best for
±6.00 and above
Illustration shows approximate relative edge thickness for a −5.00 prescription
Step 3
Every LensZee lens includes UV400, anti-glare, anti-scratch and impact-resistant coatings as standard. Choose an additional coating below.
✓ Included on Every Lens — No Extra Charge
UV400 Protection
Blocks 100% of UVA and UVB rays.
Anti-Glare (AR)
Reduces reflections for sharper vision and night driving.
Anti-Scratch
Hard coating protects lens surface from everyday wear.
Impact Resistant
Tested to withstand everyday impacts safely.
The most versatile lens — crystal clear, colourless and suitable for any environment. Perfect for full-time wear both indoors and outdoors. Optimal light transmission for the sharpest, most natural vision.
A fixed solid tint in your choice of 9 colours at 3 opacity levels. The tint is fused into the lens — it won't wear off or fade. Ideal for outdoor use, driving, or simply making a style statement.
Light 25%
Fashion tint, subtle colour
Medium 50%
Outdoor glare reduction
Dark 85%
Strong sun protection
Driving note: For driving, Category 2 tints (15–43% transmission) are recommended. Our medium 50% tint meets this. Our dark 85% tint is not suitable for driving at night.
Photochromatic lenses (also known as Transitions® lenses) contain photochromic dyes that react to UV light. They are clear indoors and automatically darken in sunlight, adapting to the light around you.
Indoors
Fully clear — like a standard lens
Outdoors
Darkens automatically in ~30 seconds
Returns Clear
Back to clear in ~5 minutes indoors
UV Blocked
Blocks 100% UVA and UVB rays
Note: Photochromatic lenses don't darken as effectively behind a car windscreen (most windscreens block UV), so they may stay light while driving.
Prescription Guide
An optical prescription looks complex, but it's straightforward once you understand what each value means. Here's your complete guide.
Example only. Your prescription values will differ.
−2.50 / +1.75The main correction power. A minus (−) value means myopia (short-sightedness). A plus (+) value means hyperopia (long-sightedness). The further from 0.00, the stronger the prescription.
−0.75 / +0.50Indicates the amount of astigmatism — an irregular cornea shape that causes blurred or distorted vision. If this field is blank or reads SPH, you have no astigmatism.
001° – 180°Only present if CYL has a value. The Axis is the angle (in degrees) that describes the direction of the astigmatism cylinder correction. It must be between 1 and 180.
+0.75 – +3.50The extra reading power added to the lower portion of a varifocal lens. Only present on varifocal or bifocal prescriptions. Always a positive number, typically +0.75 to +3.50.
58–72 mmThe distance in millimetres between the centre of your two pupils. Critical for accurate lens centering. Can be a single number (binocular PD) or two numbers (monocular — one per eye). Ask your optician to include it.
0.25 – 5.00Corrects binocular vision problems where the eyes don't align properly. Given as a numeric value with a base direction (In, Out, Up, or Down). Not common — most prescriptions won't have this.
Under the UK Opticians Act 1989, a prescription must be issued by a qualified optometrist or ophthalmic medical practitioner. Prescriptions are valid for:
2 Years
Adults up to age 69
1 Year
Age 70 and above
1 Year
Under 16, or those at risk
Always use a valid, in-date prescription. We recommend getting your eyes tested every 2 years with a registered UK optometrist.
Browse our collection, choose your frames, and we'll guide you through every lens option step by step.