Highly recommended! I had cataract surgery with Dr. Griffiths 2 years ago and am extremely happy with my eyes. The team is professional and courteous. Follow-ups have been excellent.
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How Long Should Soft Contacts Be Out Before an Eye Exam?
How Contact Lenses Affect Your Cornea
Understanding why lens-free time is needed starts with knowing what happens to your cornea while you wear contacts. This effect is normal and temporary, but it is real enough to influence your exam results.
Contact lenses rest directly on your cornea and can gently mold its surface over time. This is not a flaw in the lens or a sign of damage. It is simply a result of the lens sitting on your eye for extended periods. The effect is usually subtle but measurable, especially with certain lens types.
The temporary change in corneal shape caused by contact lens wear is called corneal warpage. It is a reversible distortion of the corneal surface, meaning your cornea returns to its natural shape after you stop wearing lenses. The time it takes to fully resolve depends on the type of lens you wear and how long you have been wearing them.
Corneal warpage can show up in your exam as irregular astigmatism (an uneven curve of the cornea) and can shift your refraction and keratometry readings. Refraction is the measurement used to determine your glasses or contact lens prescription, while keratometry measures the curvature of your cornea. When a lens-warped cornea produces those readings, the results may not reflect your true eyes, which matters most when the numbers will guide a surgical plan.
Recommended Lens-Free Times Before an Exam
The right amount of lens-free time is not one-size-fits-all. It varies based on the type of lens you wear and the purpose of your exam. The guidelines below reflect general recommendations for surgical evaluations, but your eye doctor will give you specific instructions for your situation.
For a standard glasses or contact lens check, many eye doctors prefer you arrive in your glasses rather than wearing contacts that morning. This gives your cornea a brief chance to settle before your refraction is measured. If you do not have a current glasses prescription, let the clinic know when scheduling so they can advise you on timing.
Surgical planning demands the highest level of precision. Before a refractive surgery evaluation, the FDA advises stopping soft contact lenses for 2 weeks, toric soft or rigid gas permeable lenses for at least 3 weeks, and hard contact lenses for at least 4 weeks before the initial evaluation. These are minimums. Your surgeon may request a longer period if you have worn lenses for many years or if early measurements still appear unstable.
During any required lens-free period, wearing your glasses full time helps ensure that your cornea settles into its natural shape before measurements are taken. If your glasses prescription is outdated or you rarely wear them, it is worth updating them before you start the lens-free stretch so you can see comfortably while you wait. Planning around driving and work schedules is also helpful, since you will be in glasses for the entire period.
Hard and rigid gas permeable lenses press more firmly on the cornea than soft lenses do, which means they reshape the surface more significantly. Because of this, the cornea takes longer to return to its natural shape after rigid lens wear. This is why the recommended lens-free period is longer for these lens types than for standard soft lenses.
What Happens During the Exam
Knowing what your eye doctor is measuring, and why your corneal shape matters to those measurements, can help you understand what to expect and why preparation makes a difference.
The measurements most affected by recent contact lens use are your refraction and your corneal shape scans, specifically keratometry and corneal topography. Topography produces a detailed map of the curvature of your cornea. These tests form the foundation of both a glasses prescription and a surgical plan, so their accuracy depends on your cornea being in its natural, settled state.
Other parts of a comprehensive eye exam, such as checking your eye pressure, examining the health of your retina, or looking for signs of disease, are much less sensitive to whether you wore a contact lens that morning. Your eye doctor evaluates all of these areas as part of a thorough visit, and most of them do not require a lens-free period at all.
Before laser surgery, a single set of measurements is often not enough. Our eye doctors commonly repeat key corneal scans on separate visits and look for the results to match closely before moving forward. When two sets of measurements agree, it confirms the cornea has fully settled and the numbers are trustworthy. If results are still shifting between visits, more lens-free time is needed before proceeding.
Risks of Not Waiting Long Enough
Skipping or shortening the lens-free period can affect the quality of your exam results in ways that range from minor inconvenience to more significant consequences, depending on the type of exam.
If your refraction is taken while your cornea is still slightly warped from lens wear, your resulting glasses prescription may feel slightly off. This typically means a minor adjustment later rather than a serious problem, but it does mean an extra visit and the inconvenience of lenses that do not quite feel right.
For laser vision surgery, the stakes are higher. Not leaving your contact lenses out long enough can lead to inaccurate corneal measurements, which can result in a poor surgical plan and less-than-ideal vision after surgery. This is the main reason lens-free guidelines exist for surgical evaluations. A little extra time in glasses before the exam is a straightforward way to protect the outcome of your procedure.
Corneal warpage typically resolves within about one to three weeks after stopping lens wear, and the cornea returns toward its natural shape. Nothing about this is permanent, and it does not indicate damage to your eyes. The only remedy is time, and that time is well spent knowing your measurements will accurately reflect your true corneal shape.
Warning Signs to Watch for While Out of Lenses
Going without contact lenses is safe for your eyes, but it is important to know which symptoms during your regular lens wear deserve prompt attention.
Remove your lenses immediately and contact your eye doctor the same day if you experience any of the following:
- Eye pain that does not ease after removing the lens
- Significant redness, especially in one eye
- Discharge, watering, or a persistent feeling of something in your eye
- New or sudden sensitivity to light
- Blurred vision that does not clear once the lens is removed
These can be early signs of an eye infection or corneal complication. Catching them early is what keeps a minor irritation from becoming a more serious issue. If you cannot reach your eye doctor and symptoms are getting worse, seek urgent eye care rather than waiting.
If you are unsure how long to leave your lenses out for your specific exam, call the clinic before your visit rather than guessing. Letting the team know what type of lenses you wear and what your appointment is for allows them to give you exact instructions. One phone call can prevent an appointment where measurements have to be repeated.
Frequently Asked Questions
Here are answers to some of the most common questions patients have about contact lens wear and eye exam preparation.
No, the two-week guideline applies specifically to refractive surgery evaluations, not to routine prescription checks or medical eye exams. For an everyday glasses or contact lens exam, your eye doctor may only ask that you arrive in glasses or remove your lenses at the start of the visit. Always confirm the requirement with the clinic when you schedule, since different exam types have very different needs.
Tell the clinic honestly as soon as you arrive. For a surgical evaluation or precise corneal scan, wearing lenses recently can make the measurements unreliable, and your eye doctor may need to reschedule or repeat the tests after the appropriate lens-free period has passed. It is always better to be upfront than to allow inaccurate numbers to stand, since those numbers would form the basis of your surgical plan.
It can, particularly if you are switching from rigid to soft lenses or if there is a question about your current fit. A new fitting also depends on your corneal shape being accurately measured, so your eye doctor may request some lens-free time beforehand, especially if you have been wearing rigid lenses. Mention the type and how long you have worn them when you book, and the team will advise you on any preparation needed.
Not at all. Taking a break from contact lenses is safe and sometimes gives eyes that feel dry or tired from full-time lens wear a chance to recover. The main practical concern is making sure your glasses prescription is current so the lens-free period is comfortable. If your glasses are outdated, ask about getting an updated prescription before beginning the wait.
Consistent, repeatable measurements across two separate visits are the clearest sign that your cornea has returned to its natural shape. If your results are still shifting between visits, your eye doctor will ask for more lens-free time before finalizing any prescription or surgical plan. This repeat-measurement approach is a standard safety step rather than a reason for concern.
Usually very little or none. These exams focus on the health of the inside of your eye, including the retina and optic nerve, rather than the precise shape of your corneal surface. Recent lens wear has minimal effect on these results, and your eye doctor may simply ask you to remove your lenses at the visit. If a refraction or corneal scan is also being done at the same appointment, ask specifically whether any additional lens-free time is recommended for those portions.
Schedule Your Eye Exam at NewView Eye Center
Our team at NewView Eye Center is here to guide you through every step of your eye care, including how to prepare for your specific exam so your results are as accurate as possible. Whether you are scheduling a routine prescription check, a surgical evaluation, or a comprehensive eye exam, we will give you clear, personalized instructions before your visit. We look forward to caring for your vision and helping you see your best.
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