When to Replace Your Contact Lenses (Daily)

Contact lens replacement schedules are strict medical guidelines, not suggestions. Daily disposable lenses last exactly 1 day... wear them once and discard. Two-week lenses (biweekly) should be replaced every 14 days. Monthly lenses should be replaced every 30 days. Extended-wear lenses approved for overnight use should still be replaced on their designated schedule (usually monthly). These timelines exist because protein deposits, lipids, calcium, and bacteria accumulate on the lens surface over time, reducing oxygen transmission to the cornea and increasing infection risk. Overwearing contact lenses is one of the most common and potentially serious eye health risks. The cornea gets its oxygen directly from the air (it has no blood supply), and a contaminated or protein-coated lens blocks that oxygen flow. Chronic overwear can lead to corneal neovascularization (blood vessels growing into the cornea to compensate for oxygen deprivation), corneal ulcers, and serious infections that can permanently damage vision. A survey by the CDC found that 99% of contact lens wearers report at least one risky behavior: sleeping in lenses not approved for overnight wear, not replacing on schedule, swimming in contacts, or using tap water on lenses. Daily disposables are the healthiest option because there's no cleaning, no case contamination, and a fresh sterile lens every day. They cost more per month ($30-$50 vs $20-$30 for monthlies plus solution) but eliminate the infection risk from lens care mistakes.

Putting in contact lenses takes 1-2 minutes for experienced wearers and 10-15 minutes for beginners. The learning curve is real but short... most new wearers are comfortable inserting and removing lenses within a week of practice.

Key technique: wash and dry hands thoroughly, place the lens on the tip of your index finger (check that it's not inside-out... the edge should curve inward like a bowl, not flare outward), hold your upper eyelid open with one hand, pull down the lower lid, place the lens on the white of your eye, look down and slowly release your eyelids, and blink gently.

Your eye doctor's office will train you on insertion and removal during your fitting appointment. They won't let you leave until you can do it confidently.

Ordering lenses: online retailers (1-800 Contacts, ContactsDirect, Costco Optical) typically offer better prices than your eye doctor's office. You need a current prescription (within 1 year). Your eye doctor is legally required to give you a copy of your prescription upon request.