Lens types & wear schedule

Daily vs. monthly, soft vs. rigid, toric for astigmatism, multifocal for presbyopia, and colour lenses for cosmetic use.
Daily: fresh pair each morning, discard at night. Two-week: same pair worn during waking hours for 14 days. Monthly: same pair for 30 days.
Statistically yes — they have lower infection rates, less protein build-up, and you always wear a fresh, clean lens.
Silicone hydrogels let 4–8× more oxygen through to the cornea — the modern default. Hydrogels are softer and sometimes more comfortable for dry eyes.
Anatomically possible from around age 8. The deciding factor is the child's maturity to handle the daily hygiene routine reliably.
Toric lenses correct astigmatism. They have a cylindrical correction plus a stabilisation feature so the axis stays aligned on the eye.
They correct both distance and near vision in one lens — for people over ~40 whose eyes can no longer focus close-up (presbyopia).
Most people don't need to after LASIK. If you do (for residual prescription or presbyopia later), specialty fitting from a post-surgery cornea specialist is needed.
Yes — most popular colour brands come both as plano (zero power, cosmetic only) and with SPH correction. Toric and multifocal colour options are rare.
Only if the new lens has the same SPH, CYL, AXIS and ADD AND a compatible BC/DIA. Material differences may still warrant a refit.
Soft lenses are flexible and easy to adapt to. Rigid gas-permeable (RGP) lenses are smaller, harder, and give sharper vision — especially for high astigmatism or keratoconus.
SPH corrects uniform near- or far-sightedness. CYL corrects astigmatism — when the cornea is shaped more like a rugby ball than a football.
Only in lenses specifically rated for extended or continuous wear, and only as approved by an optician. Sleeping in standard lenses is the biggest contributor to corneal infection.
AXIS is the angle (0°–180°) at which the cylinder correction is oriented in your lens. Read it like a clock face — 0° to the right, 90° straight up, 180° to the left.
The percentage of water in the lens material. Higher water (>55%) is initially more comfortable but loses moisture faster. Lower water (~38%) holds moisture longer.
Dailies for convenience, hygiene, occasional wear and allergies. Monthlies for daily full-day wear and lowest cost per day.
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