20 Contact Lens Questions Answered by Eye Doctors
Contact lenses are a convenient alternative to glasses and help millions of people achieve clear vision. However, many users have questions about safety, cleaning, wearing time, prescriptions, and common contact lens problems.
Here we answer 20 of the most frequently asked contact lens questions using evidence-based information from eye care professionals. Whether you’re a first-time user or have worn lenses for years, these expert answers can help you use contact lenses safely and comfortably.
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1. Can We Sleep with Contact Lens?
No, you should not sleep with contact lenses unless they are specifically approved for overnight wear. Sleeping in regular contact lenses increases the risk of eye infections and corneal damage.
When you sleep wearing lenses:
- Oxygen supply to the cornea decreases.
- Bacteria can multiply more easily.
- The risk of microbial keratitis increases.
- Eyes may become dry and irritated.
Even lenses approved for overnight use carry higher risks than removing them before sleep.
2. What Is the Strongest Contact Lens Prescription Available?
The strongest contact lens prescriptions vary by manufacturer. Some soft contact lenses can correct up to approximately +20.00D and -20.00D or more.
For extremely high prescriptions, eye doctors may recommend:
- Custom-made soft lenses
- Rigid gas permeable (RGP) lenses
- Scleral lenses
The best option depends on your eye shape and prescription requirements.
3. How to Clean Contact Lenses Properly?
Proper contact lens cleaning involves rubbing, rinsing, and storing lenses in a fresh disinfecting solution. This reduces deposits, bacteria, and infection risk.
Steps to Clean Contact Lenses
Proper cleaning helps remove debris, protein deposits, and microorganisms, reducing the risk of eye infections and discomfort.
- Wash Your Hands Thoroughly: Use soap and water to clean your hands before handling contact lenses. Dry your hands with a lint-free towel.
- Place the Lens on Your Palm: Carefully remove one lens and place it on the palm of your hand.
- Apply Contact Lens Solution: Add a few drops of the recommended contact lens cleaning solution to the lens.
- Gently Rub the Lens: Using your fingertip, gently rub both sides of the lens for 10:20 seconds to remove deposits and contaminants.
- Rinse with Fresh Solution: Thoroughly rinse the lens with fresh contact lens solution to wash away loosened debris.
- Store in a Clean Lens Case: Place the lens in a clean contact lens case and fill it with fresh disinfecting solution. Never reuse an old solution.
Following these steps daily helps keep your contact lenses clean, comfortable, and safe for use.
Important Cleaning Tips
- Never use tap water.
- Never use saliva.
- Replace the lens case every 3 months.
- Use only recommended cleaning solutions.
4. Is Contact Lens Good for the Eyes?
Yes, contact lenses are generally safe when used correctly and prescribed by an eye doctor. They provide a clear vision and a wider field of view than glasses.
Benefits include:
- Natural vision correction
- No fogging during activities
- Better peripheral vision
- Useful for sports and active lifestyles
Poor hygiene or prolonged wear can lead to complications.
5. Does a contact lens have power?
Yes, contact lenses contain a prescription power similar to eyeglasses. They correct refractive errors such as myopia, hyperopia, astigmatism, and presbyopia.
Common powers include:
- Minus power for nearsightedness
- Plus power for farsightedness
- Cylindrical power for astigmatism
The prescription differs slightly from glasses because contact lenses sit directly on the eye.
6. How to Know Which Contact Lens Is Right or Left?
You can identify right and left lenses by checking the markings on the lens case. Many users also assign one eye to a specific side consistently.
Helpful habits include:
- Always start with the same eye.
- Label cases clearly.
- Store each lens in its designated compartment.
If both eyes have identical prescriptions, switching sides generally causes no problem.
7. Can We Use Contact Lenses Daily?
Yes, daily use is safe if you follow your eye doctor’s instructions and recommended wear schedule. Many people wear contact lenses every day without issues.
Daily wear requires:
- Proper cleaning
- Regular replacement
- Good hand hygiene
- Routine eye examinations
Stop wearing lenses if redness or pain develops.
8. Which Contact Lens Is Best for Eyes?
The best contact lens depends on your prescription, eye health, and lifestyle. No single lens type is ideal for everyone.
Contact Lens Comparison
| Lens type | Best for |
| Daily Disposable | Convenience and hygiene |
| Monthly Disposable | Cost-effectiveness |
| Toric Lens | Astigmatism |
| Multifocal Lens | Presbyopia |
| RGP Lens | Sharp vision |
| Scleral Lens | Irregular corneas |
9. Does Contact Lens Solution Expire?
Yes, contact lens solution expires and should never be used after the expiry date. Expired solutions may lose their disinfecting ability.
Using expired solution can:
- Increase infection risk
- Causes eye irritation
- Reduce cleaning effectiveness
Always check the bottle before use.
10. Can a Contact Lens Go Behind the Eye?
No, a contact lens cannot move behind the eye. A membrane called the conjunctiva prevents anything from traveling behind the eyeball.
A lens may:
- Slide under the upper eyelid
- Fold on itself
- Become temporarily difficult to locate
Most misplaced lenses can be found and removed safely.
11. Can a Contact Lens Prescription Be Used for Glasses?
No, contact lens prescriptions and glasses prescriptions are not interchangeable. They contain different measurements.
Contact lens prescriptions include:
- Base curve
- Diameter
- Lens material
- Brand specifications
Always obtain a separate prescription for glasses.
12. Can I Use Contact Lens Solution as Eye Drops?
No, contact lens solution should never be used as eye drops. It is designed to clean and disinfect lenses, not lubricate the eye.
Using it directly in the eye may cause:
- Burning
- Irritation
- Redness
Use artificial tears approved for contact lens wearers instead.
13. How Many Hours Can We Wear Contact Lenses?
Most people can safely wear contact lenses for 8-12 hours daily. The exact duration depends on the lens type and your eye health.
The ideal wear time depends on the type of contact lens and your eye health. Always follow your eye doctor’s recommendations.
- Daily Soft Lenses: Generally recommended for 8-12 hours per day. These lenses are designed for single-day use and should be discarded after removal.
- Monthly Lenses: Generally safe to wear for 8-12 hours per day. They require proper cleaning and storage each night and should be replaced monthly.
- Silicone Hydrogel Lenses: Can be worn for up to 14-16 hours per day due to their high oxygen permeability, which helps keep the eyes comfortable.
- Extended Wear Lenses: Wear duration varies depending on the specific lens and your eye condition. These lenses should be worn only as prescribed by your eye doctor.
Avoid wearing contact lenses longer than recommended, as overuse can increase the risk of eye irritation, dryness, infections, and corneal complications. If your eyes feel dry or irritated, remove the lenses earlier.
14. How Often Should You Change Contact Lens Solution?
You should replace the contact lens solution every day. Fresh solution maintains proper disinfection and prevents bacterial growth.
Never:
- Top off the old solution
- Reuse solution
- Mix the fresh and old solutions
Empty and clean the lens case daily.
15. How to Convert Glass Power to a Contact Lens?
Contact lens power differs from glasses power because lenses sit directly on the eye. Higher prescriptions require adjustment calculations. Approximate conversions are possible, but only an eye care professional should determine the final prescription.
Myopia is becoming increasingly common among children, students, and working professionals in urban cities like Mumbai due to factors such as prolonged screen use, intensive near-work activities, and reduced outdoor time.
A person searching for myopia treatment in Mumbai can take a comprehensive eye examination at a trusted eye care center like Surya Eye Hospital before switching correction methods.
16. How to Identify the Correct Side of a Contact Lens?
A properly oriented contact lens looks like a smooth bowl with straight edges. If the edges flare outward, the lens is inside out.
Bowl Test
Correct lens:
- Smooth round shape
- Edges point upward
Inside-out lens:
- Rim flares outward
- Appears wider and flatter
Wearing a lens inside out causes discomfort and blurry vision.
17. How to Remove a Stuck Contact Lens from the Eye?
A stuck contact lens can usually be removed by lubricating the eye and gently sliding the lens downward.
Steps include:
- Wash your hands.
- Use lubricating eye drops.
- Blink several times.
- Gently massage the eyelid.
- Pinch and remove the lens carefully.
Seek medical help if removal remains difficult.
18. How to Tell If a Contact Lens Is Still in the Eye?
You may still have a lens in your eye if you feel irritation, blurry vision, or a foreign body sensation. Looking in a mirror under good lighting may help locate it.
Signs include:
- Persistent discomfort
- Excessive tearing
- Blurred vision
- Sensation of something moving
If you experience continued discomfort, redness, or vision changes, you can consult Surya Eye Hospital’s trusted eye specialist in Mumbai for a detailed eye examination.
19. How to Treat an Eye Infection Due to Contact Lenses?
Contact lens-related eye infections require immediate medical attention. Remove the lenses and consult an eye doctor as soon as possible.
Symptoms of a Contact Lens Eye Infection
Redness, pain, discharge, blurred vision, light sensitivity, and excessive tearing are common symptoms of a contact lens-related infection. These symptoms should never be ignored.
Other signs may include:
- Swelling
- Eye discomfort
- Foreign body sensation
- Reduced vision
Treatment Options
Treatment may involve:
- Antibiotic eye drops
- Anti-inflammatory medication
- Temporary discontinuation of lens use
- Follow-up eye examinations
Prompt treatment helps prevent vision-threatening complications.
For people considering permanent vision correction, LASIK surgery in Mumbai at Surya Eye Hospital may reduce dependence on contact lenses after a proper eligibility assessment.
20. Can I Wear a Broken Contact Lens?
No, you should never wear a broken, torn, or damaged contact lens. A damaged lens can scratch the cornea, cause irritation, and increase the risk of serious eye infections.
Wearing a broken contact lens may lead to:
- Eye pain or discomfort
- Redness and irritation
- Blurred vision
- Corneal scratches or abrasions
- Increased infection risk
If you notice any tears, cracks, or damage in your lens:
- Remove the lens immediately.
- Discard the damaged lens safely.
- Replace it with a new sterile lens.
- Avoid wearing lenses if your eye feels irritated.
Never try to repair or continue using a damaged contact lens, even if the tear appears small. If pain, redness, or watering continues after removing the lens, consult an eye specialist promptly.
Conclusion
Contact lenses are safe, effective, and comfortable when used correctly. Understanding proper cleaning methods, replacement schedules, wear time, and warning signs of complications helps protect your eye health.
Mumbai’s fast-paced lifestyle, long working hours, and increased screen exposure can contribute to eye strain and other vision-related concerns. It is advisable to contact a trusted eye hospital in Mumbai, which can help address contact lens complications and maintain healthy vision.
FAQ’s
No, contact lenses do not permanently worsen eyesight when used correctly. Problems usually arise from poor hygiene, sleeping in lenses, or wearing them beyond the recommended schedule. Regular eye examinations and proper lens care help maintain healthy vision and reduce complications.
Yes, daily disposable lenses generally carry a lower infection risk because users start with a fresh and sterile lens every day. They eliminate cleaning errors and solution contamination, making them a good option for people with allergies, sensitive eyes, or busy lifestyles.
Yes, teenagers can wear contact lenses safely if they follow hygiene instructions responsibly. Success depends more on maturity and lens care habits than age. Eye doctors frequently prescribe contact lenses to teenagers for sports, cosmetic preferences, and vision correction needs.
Contact lenses can reduce tear film stability, leading to dryness and discomfort. Long screen time, air conditioning, dehydration, and extended lens wear may worsen symptoms. Lubricating drops approved for contact lens users and regular breaks can improve comfort significantly.
You should stop wearing contact lenses immediately if you experience severe redness, pain, discharge, sudden blurry vision, or light sensitivity. These symptoms may indicate infection or corneal injury. Remove the lenses and seek prompt medical evaluation to prevent complications.
Yes, specially designed toric contact lenses can correct astigmatism effectively. These lenses contain different powers across specific meridians to compensate for irregular corneal curvature. Many people achieve excellent vision and comfort with modern toric lenses prescribed by eye care professionals.
