Bellalenses

How Often Should You Replace Your Contact Lenses?

Key Takeaways

  • Daily disposable lenses must be replaced every day

  • Bi-weekly lenses should be replaced after 14 days of wear

  • Monthly lenses need replacement every 30 days, regardless of how they feel

  • Rigid gas permeable lenses can last 1-2 years with proper care

  • Never wear lenses beyond their recommended replacement schedule, even if they feel comfortable

  • Signs you need to replace lenses early include discomfort, blurry vision, and redness

Introduction

Contact lenses provide the freedom of clear vision without the constraints of glasses. However, many wearers are unaware of the importance of following proper replacement schedules. Wearing lenses beyond their recommended timeframe can lead to eye irritation, infections, and potentially serious complications.

Whether you're new to contact lenses or a longtime wearer, understanding when to replace your contacts is crucial for maintaining optimal eye health. This comprehensive guide will explore the different types of contact lenses, their recommended replacement schedules, signs that you need new lenses, and best practices for lens care.

Understanding Contact Lens Types and Replacement Schedules

Contact lenses come in various types, each designed with specific wearing schedules and replacement timeframes. Adhering to these schedules is essential for preventing protein buildup, bacterial contamination, and potential eye damage. Let's examine the most common types and their replacement guidelines.

Daily Disposable Contact Lenses

Daily disposable lenses, or single-use lenses, are designed for one-time use, providing a fresh pair of lenses every day. These lenses are ideal for individuals with busy schedules who prefer the convenience of not having to clean or store their lenses. Since they are discarded after each use, the risk of infections or discomfort caused by lens buildup is significantly reduced—daily lenses have been found to cause up to 8 times fewer complications than reusable lenses. 

Replacement Schedule: Replace every day, after a single use

Benefits of Daily Disposables:

  • Lowest risk of eye infections

  • No cleaning or storage required

  • Perfect for those with allergies or sensitive eyes

  • Ideal for occasional wearers

Important: Even if they still feel comfortable, it's important not to wear daily lenses for more than one day. Replacing them every day is key to maintaining healthy, irritation-free eyes. 

Bi-weekly Contact Lenses

Biweekly lenses are meant to be worn for 14 days before needing replacement. These lenses require daily cleaning and proper storage to ensure they remain safe and comfortable. For those who prefer not to replace their lenses every day but want a more frequent change than monthly lenses, biweekly lenses offer a great middle ground. 

Replacement Schedule: Replace every 14 days

Key Considerations:

  • Must be removed nightly

  • Require daily cleaning and proper storage

  • More cost-effective than daily disposables

  • It's essential to follow the 14-day replacement schedule, as wearing them longer can lead to protein buildup, which may reduce comfort and affect your eye health. 

Monthly Contact Lenses

Monthly lenses are designed to be worn for up to 30 days, making them a cost-effective choice for those who wear contact lenses regularly. While they provide the convenience of longer wear, it's important to clean and store them properly every day to prevent bacterial buildup. 

Replacement Schedule: Replace every 30 days

Important Notes:

  • Monthly lenses should always be replaced after 30 days, even if they still feel comfortable. Wearing them beyond this timeframe can increase the risk of infections and discomfort, putting your eye health at risk. 

  • Require thorough daily cleaning

  • Need to be stored in fresh solution each night

  • More affordable for regular wearers

Extended Wear Contact Lenses

Extended wear lenses are specially designed for continuous use, including overnight wear, for a set number of days—typically ranging from one week to a full month. While these lenses offer the convenience of clear vision without needing to remove them daily, they carry a higher risk of infection due to the extended wear time. 

Replacement Schedule: Varies from 7 to 30 days, depending on manufacturer

Important Considerations:

  • It's critical to follow your optometrist's guidance on how long to wear them and when to replace them. Over-wearing these lenses, especially beyond the recommended period, can lead to serious complications like corneal ulcers. 

  • Higher risk of eye infections

  • Not suitable for everyone

  • Require regular breaks from wear

Rigid Gas Permeable (RGP) Lenses

These are also called "rigid gas permeable (RGB) lenses." The wear time for these is one to two years with proper care. These are usually recommended for people with high prescriptions, a large amount of astigmatism, or keratoconus. 

Replacement Schedule: 1-2 years with proper care

Benefits of RGP Lenses:

  • Longer lifespan than soft lenses

  • Excellent vision correction for complex prescriptions

  • Durable and resistant to deposits

  • "They are not used as commonly anymore but are beneficial and sometimes even the only option for certain people," Dr. Immler notes. 

Do Contact Lenses Expire?

The answer is simple: Yes. Contacts absolutely expire and it's never recommended to wear expired contact lenses. Contact lenses have expiration dates for a reason — they're designed with specific materials that can degrade over time. You can view the expiration date on the box your contact lenses come in or consult your healthcare provider. 

Even if your lenses are unopened and in their original packaging, never use them past their expiration date. The packaging's sterility and the lens materials themselves can deteriorate over time, potentially causing:

Using expired lenses can pose several risks, like:

  • Decreased oxygen permeability

  • Increased risk of eye infection

  • Discomfort and irritation

  • Reduced vision quality 

Always check the expiration date on your contact lens boxes, and dispose of any expired lenses properly.

Signs You Need to Replace Your Contact Lenses Early

While following the recommended replacement schedule is crucial, there are times when you may need to replace your lenses sooner. Here are key indicators that it's time for a new pair, regardless of your regular replacement schedule:

1. Discomfort or Irritation

One of the most obvious signs that your lenses need replacing is discomfort or irritation in your eyes. If your lenses feel dry, itchy, or gritty even after proper cleaning, it's likely time for a fresh pair. Over time, lenses can accumulate debris, allergens, or protein deposits that cause discomfort, and continuing to wear them in this state can lead to more serious issues like infections or eye inflammation. 

2. Blurry or Cloudy Vision

Contact lenses are designed to provide clear vision. If you notice that your vision is becoming blurry or cloudy while wearing them, it may indicate that your lenses need to be replaced. Protein buildup or small tears can interfere with your vision, and wearing your lenses past their intended lifespan can make these problems worse. 

3. Redness or Swelling

Redness or swelling in the eyes can indicate irritation or even an infection, often caused by wearing your lenses longer than advised. If your eyes remain red or swollen after removing your lenses, it's important to stop wearing them and switch to a new pair to avoid further irritation or complications. 

4. Visible Damage to the Lenses

Contact lenses are delicate and can easily be damaged during handling. If you notice any signs of damage, such as tears, scratches, or rough edges, it's essential to replace the lenses immediately. Wearing damaged lenses can not only cause discomfort but may also harm the surface of your eyes, increasing the risk of more severe issues. 

Proper Contact Lens Care

Proper lens care is essential for maintaining eye health and getting the most from your contact lenses. Follow these best practices for cleaning, storing, and handling your reusable lenses:

1. Clean Thoroughly

Every time you take out your reusable lenses, be sure to clean them with an approved contact lens solution. Gently rub the lenses with the solution to remove any buildup of protein, dirt, or debris from the day. Never use water or saliva to clean your lenses, as these can introduce harmful bacteria and increase the risk of infection. Regular cleaning keeps your lenses clear and comfortable, reducing the chance of irritation. 

2. Store Properly

When you're not wearing your lenses, always store them in a clean, sterile case with fresh contact lens solution. Reusing old solution can lead to bacterial growth, which can contaminate your lenses. It's also a good idea to replace your lens case every few months to minimize the risk of contamination. Proper storage ensures that your lenses remain safe and ready for use when you need them. 

3. Practice Good Hygiene

Before handling your lenses, always wash your hands with soap and water to avoid transferring dirt or bacteria to your eyes. Stay away from lotions or moisturizing soaps, as these can leave a residue on the lenses that may cause irritation. Clean, dry hands are a simple but effective way to protect your lenses and your eyes. 

4. Follow Manufacturer Guidelines

Different types of lenses may come with specific care instructions, so it's essential to follow the guidelines provided by your optometrist or the lens manufacturer. This includes using the right cleaning solution, following the recommended cleaning method, and adhering to proper storage practices. By following these instructions, you'll extend the life of your lenses and reduce the risk of discomfort, blurred vision, or infections. 

5. Adhere to Wearing Schedules

Even with proper care, it's important not to wear your lenses beyond their recommended timeframe. Overwearing lenses can cause the buildup of deposits, reduce oxygen flow to your eyes, and increase your risk of irritation or infection. Stick to the replacement schedule, and if your lenses feel uncomfortable before it's time for a new pair, it's better to switch to fresh lenses early. 

Risks of Not Replacing Contact Lenses on Schedule

Ignoring replacement schedules can lead to serious eye health issues. Here are the potential consequences of wearing your lenses longer than recommended:

Eye Irritation and Discomfort

Over time, contact lenses accumulate deposits of proteins, lipids, and debris from your tears and the environment. These deposits can make the lenses feel rough, leading to irritation, dryness, or a gritty sensation. Even with regular cleaning, wearing lenses beyond their intended lifespan can cause discomfort, making it harder to wear them for long periods. 

Blurred or Cloudy Vision

As contact lenses age or accumulate buildup, they may become cloudy or less effective at providing clear vision. Continuing to wear lenses beyond their recommended time can cause hazy or blurry vision, making it difficult to see clearly throughout the day. Additionally, small scratches or tears that develop in overworn lenses can distort your vision, making activities like reading or driving more challenging. 

Higher Risk of Eye Infections

One of the most serious risks of not replacing your lenses on time is a higher chance of developing an eye infection. Over time, bacteria, fungi, and other microorganisms can accumulate on the lenses, especially if they aren't replaced as recommended. These microorganisms can cause infections such as keratitis, which can result in redness, pain, discharge, and even long-term damage to your cornea if left untreated. 

Reduced Oxygen Supply to Your Eyes

Contact lenses limit the amount of oxygen that reaches your eyes, but modern lenses are designed to allow enough airflow to maintain eye health. However, as lenses age, they become less breathable, reducing oxygen flow to your cornea. This can result in corneal hypoxia, a condition that causes redness, swelling, and potentially more serious complications if oxygen deprivation persists. 

Corneal Ulcers and Long-Term Damage

In more severe cases, wearing lenses for too long can lead to corneal ulcers—painful sores that develop on the surface of the eye. Corneal ulcers can cause significant discomfort, light sensitivity, and even permanent vision loss if not treated right away. Although ulcers are rare, they are more likely to occur when lenses are worn beyond their intended lifespan, emphasizing the importance of following your replacement schedule. 

Choosing the Right Contact Lenses for Your Lifestyle

Selecting the right type of contact lenses depends on various factors, including your lifestyle, budget, and eye health needs. Consider these aspects when choosing between daily, bi-weekly, monthly, or extended wear lenses:

For Active Lifestyles

If you're frequently on the go, participate in sports, or travel often, daily disposable lenses may be your best option. They eliminate the need for cleaning supplies and cases, and provide a fresh, clean lens each day.

For Budget-Conscious Wearers

Monthly or bi-weekly lenses tend to be more cost-effective for regular wearers, though they require more maintenance. The initial investment in cleaning solutions and cases is offset by the longer replacement schedule.

For Sensitive Eyes or Allergies

Those with allergies or sensitive eyes often benefit from daily disposable lenses, as they minimize exposure to allergens and deposits that can build up on reusable lenses.

For Occasional Wearers

If you only wear contacts occasionally (such as for special events or sports), daily disposables offer convenience and eliminate concerns about solution expiration or lens deterioration between uses.

Frequently Asked Questions (FAQ)

Can I sleep in my contact lenses?

Unless you have been specifically prescribed extended wear contacts by your eye doctor, you should not sleep in your lenses. Sleeping in regular contact lenses reduces oxygen flow to your cornea and significantly increases your risk of eye infections and complications.

What happens if I wear my contacts longer than recommended?

Wearing contacts beyond their recommended replacement schedule can lead to protein buildup, reduced oxygen flow to your cornea, increased risk of eye infections, discomfort, and potentially serious complications like corneal ulcers.

Can I use water to clean or store my contact lenses?

No. Never use tap water, bottled water, or even distilled water to clean or store your contact lenses. Water can contain microorganisms that can cause serious eye infections. Always use proper contact lens solution for cleaning and storing your lenses.

How do I know if my contact lenses don't fit properly?

Signs of poorly fitting contact lenses include discomfort, blurry vision, excessive movement of the lens on your eye, redness, and sensitivity to light. If you experience these symptoms, consult your eye care professional for a proper fitting.

Can I wear my contacts while swimming or showering?

It's best to remove contact lenses before swimming or showering. Water can introduce harmful bacteria to your lenses and eyes. If you must wear contacts while swimming, wear watertight goggles over them and discard or thoroughly disinfect the lenses afterward.

How should I handle dry eyes with contacts?

If you experience dry eyes with contacts, try using preservative-free rewetting drops approved for use with contacts, consider switching to daily disposables, or ask your eye doctor about specialty lenses designed for dry eyes. Also, take regular breaks from screen time and stay hydrated.

Conclusion

Replacing your contact lenses according to the recommended schedule is essential for maintaining optimal eye health and comfort. Whether you wear daily, bi-weekly, monthly, or extended wear lenses, adhering to proper replacement intervals helps prevent complications ranging from minor irritation to serious infections.

Remember that even if your lenses still feel comfortable beyond their recommended wear time, microscopic deposits and damage can compromise your eye health. When in doubt, it's always better to replace your lenses early rather than risk eye problems by wearing them too long.

For personalized advice on the best contact lens options for your specific needs, schedule a consultation with your eye care professional. They can help you determine the ideal type, fit, and replacement schedule for your lifestyle and eye health requirements.

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