Find the Perfect Pair of Glasses
Expert reviews and honest buying guides to help you choose the best eyewear — updated November 2026.
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Reading Picks
Multi-packs and comfort-first readers at every strength. 3 editor-tested products →
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UV400 and polarized shades tested for glare and fit. 3 editor-tested products →
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Filter-tested glasses for screen days and better sleep. 3 editor-tested products →
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Latest Guides & Reviews
Night Myopia: Why Your Focus Drifts When the Light Drops
Pupils double, accommodation drifts and focus shifts about half a dioptre after dark. Why night myopia is optical, not a...
Who Pays for the Eye Test? What DSE Rules Require for Screen Work
Directive 90/270/EEC and the UK DSE Regulations require an eye test on request and work-specific glasses. What the duty ...
Bevel Geometry: How a Lens Edge Is Cut and Why It Decides the Fit
Bevel height, apex position and groove depth decide whether a lens seats, chips or cracks. How edge geometry actually wo...
The Autorefractor: What the Machine Measures Before You Answer a Question
An autorefractor finds your defocus in seconds without asking anything. Why the printout tends to over-minus, and why it...
ANSI Z80.3: What the US Sunglass Standard Actually Requires
ANSI Z80.3 caps UVB at 1 per cent and UVA at 0.3 times the visible transmittance. What that ratio actually protects, and...
EN ISO 12870: What a Spectacle Frame Is Actually Tested For
EN ISO 12870 tests frames for dimensional stability, sweat corrosion, nickel release and flammability. What the standard...
Contrast Tints for Ball Sports: Spectral Transmittance, Not Colour Preference
An amber tint is not magic, it is a filter. How spectral transmittance raises contrast against grass or clay, and where ...
Visual Field Testing: What Perimetry Measures and Why the Grid Spacing Matters
Perimetry maps sensitivity point by point, and the 6-degree grid of a 24-2 test leaves gaps a 10-2 fills. What each patt...
Hinge Screws: Thread Pitch, Clamp Force and Why Tightening Feels Like It Works
An eyewear screw is an M1.4 with a 0.3 mm pitch, which decides how far one turn moves it. What tightening actually does,...
Polycarbonate vs Trivex for Children's Glasses: Toughness, Optics and the Trade-Off
Both survive a playground. Polycarbonate is thinner and cheaper; Trivex is clearer and drills better. What the index and...
TAC vs Nylon Sunglass Lenses: What the Material Actually Changes
TAC and nylon reach the same tint by different routes. What the laminate stack does to optics, impact and heat, and whic...
Segment Inset: Why the Reading Zone Sits Closer Together Than Your Pupils
Your pupils converge at reading distance, so the near zone cannot sit under them. The geometry of inset, how much it sho...
Axis Tolerance: How Many Degrees Off Can Your Cylinder Be?
Rotate a cylinder a few degrees and residual astigmatism appears. The 2C sin theta estimate, a table of real combination...
Face-Form Angle: Why Wrapped Sunglasses Need a Compensated Prescription
Wrap sunglasses tilt the lens away from the line of sight. Face-form angle induces cylinder and prism, so a wrapped Rx h...
Image Jump: Why a Bifocal Line Makes the World Leap
Image jump is the prism built into the top edge of a bifocal segment. Why a flat-top leaps less than a round segment, an...
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