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Buying lenses well — practical guides from Hong Kong.
Did Glasses Always Have Temple Arms?
From hand-supported spectacles to side arms: explore how keeping lenses on the face became a design challenge of its ...
Latest articles
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2026.10.24
Why Did Google Try Putting a Chip in a Contact Lens?
Revisit Google's 2014 tear-glucose lens prototype and the gap between an interesting research demonstration...
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2026.10.23
Do You Still Need Protective Eyewear If You Wear Contacts for Sport?
Clear vision and impact protection are different jobs. Compare contacts, sunglasses and sports goggles, and...
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2026.10.20
Why Do Eyeglass Lenses Reflect Green in Photos?
Where do green and blue reflections on clear lenses come from? Distinguish anti-reflective coatings, lens t...
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2026.10.18
Why Do Photochromic Lenses Darken Less Inside a Car?
Photochromic lenses do not respond to brightness alone. Learn how windscreens, UV, temperature and the exac...
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2026.10.17
Why Do Polarized Sunglasses Make Your Phone Screen Look Dark?
Less glare on the water, but a darker phone? Understand polarization, LCD screens and why UV protection is ...
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2026.10.16
Where Do Protein Deposits on Contact Lenses Come From?
Lens deposits are not just dust. Discover how tear components collect on lenses and why cleaning, disinfect...
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2026.10.15
Why Do Your Right and Left Contact Lenses Have Different Powers?
Learn why each eye may need a different prescription, how to keep lenses separate when ordering, and why ch...
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2026.10.14
Why Do Clear Contact Lenses Look Blue in Your Hand?
A faint blue handling tint differs from a cosmetic lens colour. Learn how to read tint descriptions and che...
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2026.10.13
Why Are Hard Contact Lenses Still Used?
Say "contact lenses" today and most people picture soft, flexible lenses. With daily disposables everywhere...
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2026.10.12
Your First Day in Contact Lenses as an Adult
Many people wear glasses for years and try lenses for the first time as adults. For a wedding, for sport, f...
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2026.10.11
Signs You Should Take Your Lenses Out Now
If you wear lenses, some days your eyes feel a little uncomfortable. Most of the time, taking the lenses ou...
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2026.10.10
Which Eye Drops Can You Use With Contact Lenses In?
When your eyes feel dry or turn red, the first thing you reach for is the eye drops in your bag. But if you...
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