Polymer Technology Contact Lenses
Polymer Technology contact lenses are custom rigid gas permeable contact lenses sold under the Boston contact lenses name. The range includes Boston ES, Boston EO, Boston Equalens, Boston XO, and other prescribed lens designs made for clear, stable vision.
Each Boston lens has its own material, oxygen permeability, and fitting parameters, so products within the range aren't interchangeable. Check the exact product name and specifications listed on your contact lens prescription before selecting a replacement.
Browse the Polymer Technology lenses below and compare the available hard contact lenses. Save up to 70% on select products at Lens.com.
About Polymer Technology
Polymer Technology Corporation developed the Boston family of RGP contact lenses and lens care products. Bausch + Lomb acquired the company in 1983, and the Boston brand now sits within the broader Bausch & Lomb Contact Lenses portfolio.
The Polymer Technology name is still connected with Boston ES, Boston IV, Boston Equalens, Boston EO, Boston Equalens II, Boston XO, and Boston XO2. These contact lenses use several silicone acrylate and fluorosilicone acrylate materials with different oxygen-permeability ratings and prescribed uses.
What Makes Polymer Technology Boston Contacts Different?
Boston contacts are custom contact lenses rather than soft hydrogel contacts. Their firm shape, range of materials, and prescription-specific construction give eye care professionals several choices when fitting a wearer.
RGP Lenses That Hold Their Shape
Boston RGP lenses retain their shape on the eye instead of draping over the cornea like soft contacts. The tears between the lens and cornea create a smooth optical surface, which can correct standard prescriptions and mask certain corneal irregularities.
Several Oxygen-Permeability Levels
The Boston lenses sold here range from a Dk of 18 for Boston ES to a Dk of 141 for Boston XO2. Dk measures how readily oxygen moves through the lens material. A higher Dk doesn't automatically make one product the right choice for every wearer. Lens fit, thickness, design, power, and wearing schedule also affect how a finished contact performs.
Materials Used in Custom Lens Designs
Boston materials are used by specialty lens laboratories in spherical, multifocal, keratoconus, post-surgical, orthokeratology, and large-diameter designs. They may also be used to produce toric contact lenses and scleral contact lenses. The products on this page must still match the exact Boston lens and parameters written on your prescription.
Durable Lenses Made for Reuse
RGP contacts are reusable contact lenses with firm surfaces that resist some types of wear and deposit buildup. Their physical properties differ by material, so follow the cleaning routine and replacement schedule set by your eye care professional.
Made to Order and Sold Individually
Each Boston contact sold here is made according to its prescribed parameters and packaged as one lens. Right-eye and left-eye measurements can differ, so enter the product, power, base curve, diameter, and other details separately for each eye.
Which Boston Lens Matches Your Prescription?
The right Boston lens is the exact product named on your valid contact lens prescription. Boston ES, Boston IV, Boston Equalens, Boston EO, Boston Equalens II, Boston XO, and Boston XO2 use different materials and fitting specifications, so they shouldn't be swapped based on price or oxygen permeability.
Check the product name, power, base curve, diameter, and lens design before ordering. Your right and left eyes can have different measurements, so enter each side separately. Since these custom RGP contacts are sold one lens at a time, wearers who need correction in both eyes generally order two lenses.
Use the table below to check the Boston products sold here, then select the exact lens and parameters written on your prescription. Contact your eye care professional when any detail is missing, unclear, or different from the lens you currently wear.
Boston ES
Boston XO
Boston EO
Boston XO2
Boston IV
Boston Equalens
Boston Equalens II
Boston Lens Prices and Product Details
Polymer Technology Boston lenses vary in price, material, oxygen permeability, UV-absorber availability, and customer rating. The products shown are listed for daily wear and sold individually as made-to-order replacement lenses.
"Daily wear" means the contacts are removed before sleep, cleaned, disinfected, and stored for another day. It doesn't mean the lenses are daily disposables. The estimated cost per day should be read as the cost for one lens based on the listed replacement period, not the cost for a pair.
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| Boston ES | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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| Boston XO | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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| Boston EO | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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| Boston XO2 | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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| Boston IV | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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| Boston Equalens | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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| Boston Equalens II | $0.11 | Polymer Technology | Daily | RGP | 0% | 1 lenses, a 12-month supply |
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How to Get A Rebate for Polymer Technology Contact Lenses
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Are Polymer Technology Boston Lenses FDA-Cleared?
Boston lenses have FDA records under different regulatory pathways. Daily-wear Boston ES, Boston IV, Boston EO, Boston XO, and Boston XO2 lenses have 510(k) clearances. Boston Equalens has PMA approval history, while Boston Equalens II has daily-wear 510(k) clearance and PMA records connected with certain extended-wear configurations.
FDA clearance and FDA approval aren't interchangeable terms. A 510(k) clearance is based on substantial equivalence to a legally marketed device, while PMA approval follows a separate regulatory process.
The regulatory record doesn't make every Boston lens suitable for every prescription or wearing schedule. Your eye care professional selects the material, finished design, measurements, and wear time for your eyes.
Types of Vision Correction Available With Boston Lenses
Boston RGP materials are used in finished lenses for several prescription and corneal needs. The exact use depends on the material, design, fit, and contact lens prescription.
They can be prescribed for:
- Nearsightedness, also called myopia
- Farsightedness, also called hyperopia
- Astigmatism
- Presbyopia
- Aphakia, or the absence of the eye's natural lens
- Keratoconus
- Pellucid marginal degeneration
- Certain irregular corneal conditions
- Vision correction after penetrating keratoplasty
- Vision correction after refractive procedures such as LASIK
Not every Boston product is prescribed for every use listed. Specialty RGP contacts require individual measurements, a professional fitting, and follow-up visits with an eye care professional.
Can You Sleep in Polymer Technology Boston Contact Lenses?
The Boston lenses sold on this page are listed as daily-wear RGP contacts, so take them out before sleeping or napping.
Boston Equalens and Boston Equalens II materials have regulatory records connected with certain extended-wear configurations. That doesn't make the daily-wear replacement lenses shown here suitable for sleeping. Wear Boston contacts overnight only when your eye care professional has prescribed a finished lens with labeling for that schedule.
Sleeping in contacts outside the prescribed schedule increases the risk of eye infection and corneal complications. Remove the lens and contact your eye care professional if you notice pain, redness, discharge, light sensitivity, or blurred vision.
How to Stay Comfortable in Boston RGP Contact Lenses
Follow Your Prescribed Wear Time
Wear your Boston lenses according to the schedule from your eye care professional. Remove them when you reach the end of your prescribed wear time or when your eyes become irritated.
Keep the Lens Surface Clean
Deposits, debris, cosmetics, and care-product residue can cause scratchiness or blurred vision. Clean and disinfect the lenses after each wear with products labeled for RGP contacts.
Have the Fit Checked When Something Changes
Schedule a fitting check when a lens shifts frequently, fogs repeatedly, becomes difficult to remove, or no longer gives stable vision. Changes in the lens surface, prescription, or corneal shape can affect fit.
Don't Ignore Eye Symptoms
Remove the lenses and contact your eye care professional if you notice pain, unusual redness, persistent dryness, discharge, light sensitivity, halos, or blurred vision. Don't put the lenses back in while symptoms continue.
Caring for Polymer Technology Boston Contact Lenses
Boston RGP contacts need cleaning, disinfection, and proper storage between wears. Follow the routine from your eye care professional and use care products labeled for rigid gas-permeable lenses.
Start With Clean, Dry Hands
Wash your hands before touching the lenses and dry them with a clean, lint-free towel. Avoid perfumed or medicated soaps that can leave residue on the lens surface.
Clean and Disinfect After Each Wear
Clean and disinfect the lenses according to the care-product label and your eye care professional's directions. Store them in a clean case filled with fresh, unexpired disinfecting liquid. Don't reuse old liquid or top it off.
Keep Your Lenses Away From Water
Don't use tap water, bottled water, distilled water, or saliva to rinse, store, or rewet your contacts. Remove them before swimming, showering, or entering a hot tub unless your eye care professional gives you different instructions.
Care for the Storage Case
Clean the storage case when you clean your lenses and leave it open to air-dry. Replace it according to the schedule from your eye care professional.
Use Products Labeled for RGP Contacts
Use cleaning, disinfecting, conditioning, and rewetting products labeled for rigid gas-permeable lenses. Don't assume that every soft-contact care product is compatible with Boston contacts.
Follow the Prescribed Replacement Schedule
Replace each Boston lens at the end of the schedule set by your eye care professional. Scratches, deposits, warping, or fit changes aren't always easy to spot at home.
Why Shop Polymer Technology Boston Contact Lenses at Lens.com?
We carry Boston ES, Boston IV, Boston Equalens, Boston EO, Boston Equalens II, Boston XO, and Boston XO2. You can check prices, materials, lens counts, availability, and customer ratings before ordering the product written on your prescription.
Save Up to 70% on Contact Lenses
Shoppers can save up to 70% on select contact lenses at Lens.com. Boston RGP prices depend on the product, quantity, prescribed parameters, and current promotion.
These made-to-order Boston contacts are sold as one lens. Check the quantity for each eye and the full order total before paying.
We Verify Your Contact Lens Prescription
You can send us a copy of your prescription or enter your eye doctor's contact details so we can request verification. The request includes the prescribed product, power, base curve, diameter, and quantity.
Your prescriber has eight business hours to confirm, correct, or reject a complete verification request. When the prescriber doesn't respond within that period, federal rules treat the prescription as verified.
AutoRefill for Eligible Contacts
Eligible contacts can be enrolled in AutoRefill for scheduled shipments and 5% off future recurring orders. You can change the quantity, shipping frequency, next delivery date, address, payment details, or cancel through your account.
AutoRefill eligibility differs by product. Check your cart to see if it's available for the Boston lens you're ordering.
Online Vision Exam for Eligible Wearers
Some current contact lens wearers can renew an expired prescription through our online vision exam. Eligibility depends on your age, state, health history, and previous prescription.
The online exam is for prescription renewals, not first-time RGP fittings or changes to the prescribed lens material or design. First-time contact lens wearers still need an in-person exam and fitting with an eye care professional.






