The world,
in focus.
For eyes that other clinics said were too complicated.
Tell us about your eyes.
Answer three questions. Get a personalised lens category recommendation — before you scroll.
4,200+
lenses fitted
97%
first-fit success
15 min
topography scan
Every question your optometrist
didn't have time to answer.
78%
of contact lens wearers experience dryness by hour 6
1 in 2000
people have keratoconus — most go undiagnosed for years
3.2mm
average base curve variation between lens brands — your eyes notice
15 min
corneal topography scan that changes everything about your fit
"Why do my contacts dry out by 3pm?"
It's not your eyes — it's your lens material.
Standard hydrogel lenses contain 38–58% water, which sounds hydrating until you realise that water content actually correlates with oxygen restriction. The lens dries by drawing moisture from your tear film. Silicone hydrogel transmits oxygen independently of water, so your tear film stays intact. Most patients notice the difference within two hours of a properly fitted lens.
Moisture Retention at Hour 8
Water content alone doesn't determine comfort — oxygen permeability and surface wettability matter equally.
"My optometrist says my fit is fine. Why do they still feel wrong?"
A 'fine' fit and an optimised fit are different things.
Standard optometry appointments allocate 8–12 minutes to contact lens assessment. Clarity's fitting protocol includes corneal topography (a 3D surface map), tear film break-up time analysis, and base curve matching to within 0.1mm. An irregular cornea, a 0.2mm base curve mismatch, or a lens material with poor wettability can each cause the discomfort you're describing — none of which appears on a standard prescription check.
"My GP said there's nothing more they can do for my corneas. Is that true?"
For irregular corneas, scleral lenses are often the beginning — not the end.
Keratoconus, post-LASIK irregularity, corneal scarring, and severe dry eye are all conditions where standard soft lenses fail — not because contacts can't work, but because the lens geometry doesn't match the corneal surface. Scleral lenses vault the cornea entirely, resting on the white of the eye. The fluid reservoir between lens and cornea acts as a continuous artificial tear layer. Patients who were told contacts were impossible often achieve 20/20 vision within their first week.
Scleral Lens Cross-Section
Vault clearance
200–400µm
Saline reservoir
Continuous
Corneal contact
Zero
Suitable for
Keratoconus, post-surgical, severe dry eye
The Complete
Lens Guide.
32 pages comparing every contact lens type, wear schedule, and care routine — written by our optometrists, not a marketing department.
- Silicone hydrogel vs. standard hydrogel — the oxygen table
- Scleral lens candidacy checklist (self-assess in 2 minutes)
- The full water content comparison chart
- Dry eye severity scoring and lens recommendations
- Questions to ask at any contact lens appointment
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