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About this tool
Track daily wear hours, replacement dates and lens case changes for daily, fortnightly, monthly, quarterly or yearly contact lenses.
The Contact Lens Wear Tracker counts a lens replacement window from the day the blister or vial was opened — 1 day for daily disposables, 14 for two-weekly, 30 for monthly, 90 for quarterly and 365 for conventional lenses — and reports the exact replacement date, the percentage of life used and the cumulative hours worn. It also applies the CDC hygiene rule that a lens storage case should be replaced at least every three months. Useful for anyone who has lost track of when a pack was opened or who wants to see how many lenses a year their wearing pattern actually consumes.
Open Contact Lens Wear Tracker on AltFTool — it loads instantly in your browser.
Choose your Lens replacement schedule - daily disposable 1 day, two-weekly 14, monthly 30, quarterly 90 or conventional 365 - and enter the date the pack was opened.
Add Hours worn per wearing day, Wearing days per week and the date the lens case was last replaced.
Read the replacement date, percent of lens life used, cumulative hours worn and the CDC three-month case change date, then press Copy result.
Monthly and two-weekly lenses expire on the calendar, so unworn days still count against them.
Converts wearing days per week into the real hours those lenses have been on the eye.
Adds the CDC three-month lens case replacement date next to the lens date.
From opening. The 30-day clock starts when the blister is broken because the count covers protein and lipid deposits plus solution and case contamination, not just hours on the eye. A monthly lens opened and worn only five times still has to be discarded on day 30.
Most practitioners set a ceiling of around 12 hours a day for soft daily-wear lenses, and a new wearer usually builds up from about 4 hours on day one, adding roughly 2 hours a day. Your own fitting card is the authority — some lens materials and some eyes tolerate less.
At least every three months, per CDC contact lens hygiene guidance. Empty and rub-rinse the case with fresh solution after each use, air-dry it face down, and never top up old solution.
Deposits build up on the lens surface, oxygen transmission falls and the risk of infection and corneal inflammation rises — microbial keratitis is the serious end of that. If lenses are overdue, discard them; if the eye is red, painful, light-sensitive or blurred, remove the lenses and see an eye care professional the same day.