Myopia: why distant things look blurry
A practical introduction to nearsightedness and the questions to bring to an eye exam.
THE CLEAR VISION GUIDE
Encyclopedia
Explore practical guides to vision, lens materials, coatings, progressive lenses, contact care and buying glasses, with overseas sources.
01
Vision basics
Understand what your eyes need.
02Lens materials
Look beyond the index number.
03Coatings & light
Separate useful features from claims.
04Progressive lenses
Find your way from near to far.
05Contact lens care
Everyday habits for safer wear.
06Buying glasses
Ask better questions at your appointment.
All guides
Presbyopia is not the same as farsightedness
Why near vision changes with age, including when you already wear distance glasses.
Single vision, bifocal or progressive?
Start with the distances you need to see, then discuss a lens design.
Lens index: what 1.50, 1.60 and 1.67 mean
Higher index can change thickness, but it is only one part of choosing a lens.
Why frame size changes lens thickness
Your prescription, frame shape and fitting measurements work together.
Lens materials: more than thinness
Discuss weight, optical properties and impact needs as separate requirements.
Do blue-light glasses help with screen strain?
What a Cochrane review does—and does not—tell us about blue-light filtering lenses.
Photochromic lenses and driving: check the variant
Different light-reactive lenses have different uses, especially behind a windscreen.
Sunglasses: check UV protection first
A dark appearance is not the same thing as a verified UV protection claim.
How progressive lens zones work
Understand the journey between distance, intermediate and reading vision.
Office lenses: begin with your monitor distance
A work-specific design needs a clear description of your workspace.
What does a personalised progressive lens mean?
Compare the measurements and design process, not just the premium label.
Keep water away from contact lenses
Why showering, swimming and lens rinsing need different habits.
Contact lens cleaning: fresh solution matters
Reusable lenses and their storage case both need an appropriate care routine.
Contact lens discomfort: when to stop wearing
Pain or unusual redness calls for attention, not another trial of the same lens.
Read your glasses prescription without guessing
A guide to SPH, CYL, AXIS, ADD and the fitting measurements recorded alongside them.
How to compare two lens quotes fairly
Get the exact design, material and service terms in writing.
Collecting new glasses: a practical checklist
Check the order, fit and everyday tasks before leaving the practice.