Silicone Hydrogel Contact Lenses
What Are Silicone Hydrogel Contact Lenses?
Silicone hydrogel lenses combine two materials: a water-loving hydrogel and oxygen-permeable silicone. Traditional soft lenses rely only on water content to transmit oxygen to your eye. The silicone component in these newer lenses permits oxygen to diffuse through the silicone phase of the material.
This unique structure means silicone hydrogel lenses can deliver significantly more oxygen than conventional soft lenses, often several times higher depending on brand and lens thickness. The result is a lens that supports better corneal health while maintaining comfort and clear vision throughout the day.
Your cornea needs a steady supply of oxygen to stay healthy because it has no blood vessels of its own. When a contact lens sits on your eye, it acts as a barrier between the air and your cornea. If that barrier blocks too much oxygen, your cornea may swell, develop new blood vessels, or become more vulnerable to infection.
- Adequate oxygen prevents corneal swelling and discomfort
- Better oxygen flow reduces the risk of serious complications
- Higher oxygen transmission supports long-term eye health
- Improved breathability allows for longer comfortable wear times
Silicone hydrogel lenses come in several replacement schedules. Daily disposable lenses are worn once and thrown away each night, offering maximum convenience and hygiene. Two-week and monthly replacement lenses require nightly cleaning and storage but may be more economical for some patients.
Extended wear lenses are approved for wearing overnight for a certain number of consecutive nights. We may recommend extended wear options only after carefully evaluating your eye health and discussing the increased risks associated with sleeping in any contact lens. Daily disposables are associated with fewer deposit-related and inflammatory events than reusable lenses when worn and cared for properly.
Most contact lens wearers can benefit from silicone hydrogel materials. These lenses are especially helpful if you wear contacts for long hours, experience dryness with traditional lenses, or need the flexibility of occasional overnight wear. People with healthy corneas and good hygiene habits tend to do best with any contact lens type.
- Patients who wear lenses more than eight hours daily
- Those with mild dry eye symptoms
- Contact lens wearers seeking better corneal health
- Individuals with prescriptions for nearsightedness, farsightedness, or astigmatism
- Individuals needing multifocal correction for presbyopia
Patients with moderate dry eye or ocular surface disease may do better with daily disposables, scleral lenses, or gas permeable lenses. If you want overnight vision correction without sleeping in soft lenses, ask about orthokeratology.
Benefits of Silicone Hydrogel Lenses
Higher oxygen transmission significantly lowers your risk of low-oxygen problems such as corneal swelling and blood vessel growth into the cornea. Low oxygen occurs when your cornea does not receive enough oxygen. Silicone hydrogel lenses help maintain a healthier corneal environment by reducing oxygen-related stress.
Research suggests that wearers of silicone hydrogel lenses may experience fewer low-oxygen inflammatory events and less corneal stress during day wear. While no contact lens eliminates all risks, these materials represent a safer option for low-oxygen complications during day wear. Infection risk depends heavily on wear schedule and hygiene.
Many patients report that silicone hydrogel lenses stay comfortable throughout the day, even during the late afternoon and evening hours. The improved oxygen flow helps reduce the tired, dry feeling that some people experience with traditional soft lenses. Many patients find that their eyes often remain whiter and feel fresher after a full day of wear.
- Less end-of-day discomfort and irritation
- Reduced redness and eye fatigue
- Better tolerance during computer work or screen time
- Maintained comfort in air-conditioned or heated environments
If you have mild dry eye, certain silicone hydrogel lenses may work better for you than conventional materials. Because these lenses need less water content to transmit oxygen, they may pull less moisture from your tear film. We can select specific brands and designs that optimize surface wetting and moisture retention.
Some silicone hydrogel daily disposables incorporate special coatings or embedded moisture agents. These features help the lens surface stay hydrated throughout the day, providing relief for patients who previously struggled with lens-related dryness.
Certain silicone hydrogel lenses are approved for up to 6 nights of extended wear or up to 30 nights of continuous wear, depending on the brand and prescription. This flexibility can be convenient for shift workers, travelers, or individuals with active lifestyles. However, sleeping in contacts always increases infection risk compared to daily wear.
Daily disposable lenses are for day wear only and should not be slept in. Not everyone is a candidate for any overnight wear. The risk of microbial keratitis is higher with sleeping in lenses than with day wear.
We carefully evaluate each patient before approving overnight wear. If we determine that extended wear is appropriate for you, we will provide detailed instructions and schedule more frequent follow-up visits to monitor your eye health closely. If approved for overnight wear, typical follow up is after 1 week, 1 month, and then every 6 to 12 months.
Getting Fitted for Silicone Hydrogel Lenses
Your contact lens fitting begins with a comprehensive eye exam to assess your overall eye health and confirm your prescription. We examine the front surface of your eyes using specialized instruments and check for any conditions that might affect lens wear. This process ensures that contact lenses are safe for you and identifies the best lens type for your needs.
- Complete vision and refraction testing
- Evaluation of corneal health and shape
- Assessment of tear film quality and quantity
- Discussion of your lifestyle and wearing schedule
We measure the curvature of your cornea using an instrument called a keratometer or corneal topographer. These measurements tell us which base curve will center properly on your eye. We also measure the width of the visible part of your iris to determine the correct lens diameter.
The fit of your contact lens affects both comfort and vision quality. A lens that is too flat may move excessively and cause discomfort, while a lens that is too steep can limit movement and tear exchange, trapping debris and increasing the risk of low-oxygen signs and discomfort despite the lens's oxygen transmissibility.
After selecting the most appropriate silicone hydrogel lens for you, we provide trial lenses to wear before purchasing a full supply. This trial period typically lasts a few days to a week and allows you to evaluate comfort, vision, and handling. Some patients adapt immediately, while others need a brief adjustment period as their eyes get used to the new lenses.
During your trial, we teach you proper insertion and removal techniques, cleaning procedures, and wearing schedules. You should contact our office during the trial if you experience significant discomfort, redness, or vision problems.
We schedule a follow-up visit shortly after you begin wearing your new lenses. At this appointment, we check the fit while the lenses are on your eyes and examine your corneas for any signs of irritation or poor lens movement. We also answer questions and address any concerns you may have developed during the first week of wear.
- Evaluation of lens position and movement on the eye
- Assessment of corneal response to the new lenses
- Review of insertion, removal, and care techniques
- Adjustment of lens parameters if needed
- Establishment of ongoing follow-up schedule
Caring for Your Silicone Hydrogel Lenses
If you wear reusable silicone hydrogel lenses, clean them every time you remove them from your eyes. Always wash and completely dry your hands before handling lenses or the lens case.
Never reuse old solution or top off partially used solution. Replace your lens case every one to three months to reduce the risk of contamination.
If you use a multipurpose solution, rub the lens in the palm of your hand for 10 to 20 seconds per side with multipurpose solution, then rinse with multipurpose solution before placing lenses in a clean case filled with fresh multipurpose solution.
If you use a hydrogen peroxide system, only use the provided neutralizing case. Do not put unneutralized peroxide directly on the lens in your hand or in your eye. Allow the full neutralization time before inserting lenses. Never reuse or top off peroxide.
Each day, empty the case, rub the wells with clean fingers, rinse with fresh solution, wipe dry with a clean tissue, and air-dry face down with caps off. Replace the case at least every 1 to 3 months.
Not all contact lens solutions work equally well with all silicone hydrogel materials. Some older solutions can cause deposits or discomfort with certain lens brands. We recommend specific solutions that are compatible with your particular lenses and will not compromise lens performance or comfort.
- Use only solutions recommended by our eye doctor and avoid generic brands unless we approve them
- Check expiration dates before using any solution
- Follow manufacturer instructions for disinfection time
- Do not mix care systems or switch brands without our guidance
- Never put unneutralized hydrogen peroxide solution directly in your eye
Even though silicone hydrogel lenses transmit more oxygen, you should still remove them before bed unless we have specifically approved overnight wear. Typical day wear is individualized. Many patients wear lenses 8 to 12 hours, depending on comfort and environment. If your eyes feel tired or irritated, remove your lenses and give your eyes a break. If you are new to contacts, increase wear time gradually over several days as directed.
Your individual wearing time may be shorter if you have dry eyes or work in challenging environments. We will help you establish appropriate wearing hours based on your eye health and comfort.
Always follow the replacement schedule prescribed for your specific lenses. Daily disposable lenses must be discarded after a single use, even if you only wore them for a few hours. Two-week lenses should be thrown away after 14 days, and monthly lenses after 30 days, regardless of how many times you actually wore them.
Wearing lenses beyond their replacement date increases your risk of infection, discomfort, and reduced vision quality. The materials break down over time, and protein deposits accumulate even with careful cleaning.
Certain practices can seriously harm your eyes or damage your lenses. Important safety rules include never using saliva or water to wet or store your lenses, never sharing lenses, never sleeping in lenses not approved for overnight wear, and never wearing lenses that are damaged, torn, or expired. Always remove lenses if you experience discomfort or redness.
- Never wear contact lenses while swimming, in hot tubs, or in the shower due to risk of severe infections, including Acanthamoeba keratitis
- If water exposure is unavoidable, use daily disposable lenses with sealed goggles and discard lenses immediately afterward
- Never handle lenses with wet hands or expose your lens case to tap water
- Insert lenses after applying makeup and remove lenses before removing makeup. Avoid aerosol sprays while lenses are in
- Avoid smoking. Smoking increases the risk of contact lens complications
Recognizing and Addressing Problems
A poorly fitting lens may slide around excessively when you blink or look in different directions. You might notice blurred vision that improves when you blink or move the lens. Some people experience a feeling that the lens is about to fall out or persistent awareness of the lens in the eye.
Contact our office if your lenses consistently feel uncomfortable or move too much. We can adjust the base curve, diameter, or brand to achieve a better fit. Never continue wearing lenses that do not fit properly, as this can lead to corneal irritation or abrasion.
Eye infections require immediate attention and can become serious quickly. Watch for pain that does not go away after removing your lenses, increasing redness, light sensitivity, or discharge. Blurred vision that persists without your lenses may also indicate a problem.
- Moderate to severe eye pain or foreign body sensation
- Excessive tearing or mucus discharge
- Sudden vision changes or halos around lights
- Swelling of the eyelid or eye tissue
- Redness that worsens after lens removal
If infection is suspected, remove lenses, do not reinsert them, and seek same-day care.
Proteins and lipids from your tears naturally accumulate on contact lenses over time. These deposits can make your lenses feel uncomfortable, cause blurry vision, or trigger allergic reactions. Proper daily cleaning significantly reduces deposit formation, but some buildup is inevitable with reusable lenses.
If deposits become problematic despite good hygiene, we may recommend switching to daily disposable lenses or a different cleaning system. Some patients benefit from weekly enzymatic cleaners or hydrogen peroxide systems that provide deeper disinfection.
Mild dryness can often be relieved with rewetting drops designed for contact lens wearers. Use only drops that are labeled as compatible with silicone hydrogel lenses. Avoid redness-relief drops while wearing lenses. If you need drops more than 4 times per day, use preservative-free lubricating drops that are contact-lens compatible.
If dryness persists, we may adjust your lens brand, recommend a different replacement schedule, or suggest reducing your daily wearing hours. Environmental modifications like using a humidifier or taking screen breaks can also help maintain comfort.
Remove your lenses immediately if you experience sudden pain, redness, or vision changes. Also remove them if something gets trapped under a lens and rinsing does not help, or if a lens becomes damaged. After removing your lenses, call our office to describe your symptoms and determine whether you need to be seen.
- Any trauma or foreign object entering the eye
- Torn, ripped, or cracked lenses
- Persistent irritation that does not resolve after lens removal
- New symptoms that concern you
Certain symptoms require urgent medical attention, even outside regular office hours. Seek immediate care if you experience severe eye pain, sudden significant vision loss, or symptoms of infection. Chemical splashes or eye injuries also require emergency evaluation, even if they seem minor.
A red eye with discharge and pain may indicate a serious infection that needs treatment within hours to prevent permanent damage. Contact lens-related infections can worsen within hours. Seek 24-7 urgent care. Never wait until the next business day if you have severe symptoms or suspect a serious problem.
Frequently Asked Questions
Some silicone hydrogel lenses are FDA-approved for overnight wear, but we only recommend this option for select patients after careful evaluation. Sleeping in any contact lens increases your risk of serious eye infections by about five to eight times compared to daily wear, even with high-oxygen materials. Daily disposables are for day wear only.
If your lifestyle requires occasional overnight wear, we will discuss the safest approach and monitoring schedule for your situation.
Silicone hydrogel lenses typically cost slightly more than traditional soft lenses, but the price difference has decreased significantly in recent years. Many manufacturers now offer silicone hydrogel options at competitive prices, especially in daily disposable formats.
The long-term benefits to your eye health and comfort may be worth the additional cost for many wearers, depending on priorities.
Yes, silicone hydrogel materials are available in toric designs that correct astigmatism. These lenses incorporate special features to keep them oriented correctly on your eye so the astigmatism correction stays aligned with your visual axis.
We fit many patients with astigmatism successfully in silicone hydrogel toric lenses for both daily disposable and reusable options.
Yes. Silicone hydrogel multifocal lenses can correct presbyopia, which is the age-related loss of near focusing ability.
We will determine if a multifocal design suits your visual needs.
Some silicone hydrogel lenses include UV-blocking features that filter harmful ultraviolet rays. However, contacts do not cover the entire eye.
You should still wear quality sunglasses outdoors for complete UV protection.
Avoid all water exposure while wearing contacts due to the risk of severe infections from waterborne microorganisms.
If unavoidable, wear daily disposable lenses with sealed goggles and discard the lenses immediately afterward to reduce infection risk.
Getting Help for Silicone Hydrogel Contact Lenses
Our eye doctor can evaluate whether silicone hydrogel contact lenses are right for you and provide expert fitting and ongoing care. We will work with you to select the best lens type, replacement schedule, and care system for your individual needs. Schedule a comprehensive contact lens exam to explore your options and experience the benefits of modern lens technology.