Hard Contact Lenses: Common Issues and Care Tips

What are some issues related to rigid gas permeable contact lenses?

Hello Dr.
Lin...
I have been using soft contact lenses for a while now, and it's been almost two years, so I need to switch to rigid gas permeable (RGP) lenses this time.
However, when I wear them, I often feel like there is a film over my vision, similar to the sensation of having just cried, even though I am not actually tearing up.
If I consciously open my eyes wide, the situation improves slightly.
What could this be? Is it a matter of adaptation, or could it be that the lenses are smaller, causing this issue? Previously, I didn't need to rinse my soft lenses with saline before wearing them, and I didn't have any allergies.
What about the rigid lenses? Is the solution for rigid lenses stronger than that for soft lenses? (I usually use the Bausch + Lomb brand.) Could you please advise me on the best way to clean rigid lenses? Is the cleaning method the same as for soft lenses? Thank you...

tomcloud, 20~29 year old female. Ask Date: 2005/02/21

Dr. Lin Zhengyi reply Ophthalmology

Hello! When wearing contact lenses, discomfort or blurriness may be caused by several factors, such as difficulty adjusting to rigid gas permeable lenses, improper curvature, or incorrect lens care methods.
The actual cause can only be determined through a professional examination.
If the cleaning and maintenance methods are correct, rigid lenses should be less likely to cause allergies compared to soft lenses.
The care methods for both soft and rigid contact lenses are quite similar; generally, after removing the lenses, you should rub them with a cleaning solution, rinse with saline solution, and then soak them in a disinfecting storage solution for at least 4-6 hours.
Some multipurpose solutions can replace both the cleaning and storage solutions.
Before wearing the lenses the next day, rinse them again with saline solution before putting them on.
It is recommended to soak them in enzyme solution once a week.
However, unless the storage solution is specifically labeled as suitable for both soft and rigid lenses, rigid contact lenses should use a solution specifically designed for rigid lenses, and the same applies to soft lenses.
Do not mix them.

Reply Date: 2005/02/21

More Info

When transitioning from soft contact lenses to hard (rigid gas permeable) lenses, it's common to experience a variety of sensations and adjustments. The feeling of having tears obstructing your vision, as you described, could be attributed to several factors related to the nature of hard lenses and how they interact with your eyes.

Understanding Hard Contact Lenses
1. Lens Fit and Size: Hard lenses are typically smaller in diameter compared to soft lenses. This can lead to a different sensation when wearing them. If the lens does not fit properly, it may not align well with your cornea, causing discomfort and visual disturbances. It's essential to ensure that your lenses are fitted correctly by an eye care professional.

2. Tear Film Interaction: Hard lenses create a tear film reservoir between the lens and the cornea. If this tear film is not stable, it can lead to blurred vision or a sensation of dryness. This might explain the feeling of having tears obstructing your vision. If your eyes are not producing enough tears or if the tear film is unstable, you may experience discomfort. Using artificial tears specifically designed for contact lens wearers can help alleviate this issue.

3. Adaptation Period: Transitioning to hard lenses often requires an adaptation period. Your eyes may need time to adjust to the different material and fit. During this time, it's normal to experience some discomfort or changes in vision. If the discomfort persists beyond a few days or worsens, you should consult your eye care provider.

Care and Maintenance of Hard Contact Lenses
1. Cleaning Solutions: Hard lenses require specific cleaning solutions that are different from those used for soft lenses. While soft lenses can often be rinsed with saline, hard lenses typically need a multipurpose solution or a specific hard lens cleaner. It's crucial to follow the manufacturer's recommendations for cleaning and storage.

2. Cleaning Routine: The cleaning process for hard lenses generally involves:
- Rinsing: Always rinse the lenses with the appropriate solution before and after use.

- Soaking: Store the lenses in a clean case filled with fresh solution overnight. This helps to disinfect the lenses and keep them moist.

- Avoiding Tap Water: Never rinse your lenses with tap water, as it can introduce harmful microorganisms that may lead to infections.

3. Disinfection: Hard lenses typically require a more rigorous disinfection process than soft lenses. Ensure you are using a solution that effectively disinfects the lenses, as hard lenses are more prone to protein buildup and deposits.

4. Regular Check-ups: Regular visits to your eye care provider are essential to ensure that your lenses are fitting well and that your eyes are healthy. They can provide personalized advice based on your specific needs and any issues you may encounter.

Conclusion
In summary, the sensation of having tears obstructing your vision when wearing hard contact lenses could be due to several factors, including lens fit, tear film stability, and the adaptation process. It's essential to maintain a proper cleaning routine and consult with your eye care provider if discomfort persists. They can help ensure that your lenses are suitable for your eyes and provide guidance on the best care practices. Transitioning to hard lenses can take some time, but with proper care and adjustments, many users find them to be a beneficial option for vision correction.

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