The Rawbare Journal
Lens Index Explained: 1.50, 1.61, 1.67 and 1.74
A reference guide to refractive index in prescription lenses: what the number means, how it changes thickness, and how to match index to power.
Do Colour Blindness Glasses Work? What the Evidence Shows
An evidence-led explanation of colour vision deficiency, what filter-based lenses do, and the realistic limits of what they achieve.
Progressive vs Bifocal vs Single Vision Lenses
A comparison of the three main prescription lens designs, the trade-offs of each, and practical guidance on choosing and adapting.
Why Lenses Fog and How to Stop It
An explanation of why lenses fog and a practical ranking of the methods that work, including which household remedies damage coatings.
