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The constant evolution of materials used to manufacture rigid gas permeable contact lenses ensures diverse ocular health solutions are available. RGP lenses are known for their longevity, optical sharpness, and good eye health. These lenses incorporate various materials, each with hydration, permeability, and durability properties.
Gas Permeable Materials
RGP contact lenses are mainly made from gas permeable materials. These materials include fluorosilicone, which allows oxygen to pass through the lenses to keep the eyes hydrated. This comfort level makes RGP lenses appropriate for extended wear. The fluorosilicone also enhances the lens's shape retention, ensuring users enjoy optimal eyesight correction over a long time.
Plastics of High Chromatic Quality
Many RGP lenses manufacturers use Fluorinated Ethylene Propylene or FEP, well-known for its high-quality optical properties and high chromatic. This plastic ensures the lenses remain clear and free of aberrations. This helps in maintaining quality vision. FEP offers excellent damage resistance, improving the lens's durability.
Silicone Derivatives
In most cases, silicone is integrated with other materials to increase gas permeability. This combination improves comfort by retaining moisture within the lens. This makes silicone RGP lenses suitable, especially for wearers who experience dryness with their contacts. Silicone's excellent biocompatibility ensures these lenses are safe and easy to wear for extended periods.
Hydrogel Coatings
Although hydrogel is largely used in soft contact lenses, thin hydrogel coatings are used on RGP lenses to increase comfort. A thin layer of hydrogel helps improve the RGP lenses' wettability and lubrication, reducing friction when the eyelid and lens come into contact. This coating benefits wearers new to RGP lenses as it reduces the possibility of initial discomfort.
Rigid gas permeable contact lenses come in various designs, each addressing specific vision correction needs and preferences. Their advanced optical performance and comfort make them appealing to many users. Below are some of the commonly accountable designs of these lenses.
Front-Surface Astigmatic Design
These RGP lenses feature specific geometries on the front surface to correct astigmatism. The lens's vector power is oriented in the needed meridians to ensure accurate astigmatism correction. Front-surface astigmatic lenses also offer good visual acuity and stability for astigmatic patients. This feature makes them especially helpful for individuals with moderate to substantial astigmatism.
Back-Surface Toric Design
Back-surface toric RGP lenses correct astigmatism by incorporating different radii on the back surface of the lens. This design fits the eye's shape, providing a stable optical zone for accurate vision correction. The lenses rotate into the right position due to their alignment with the cornea. This feature helps provide sharp vision, particularly to patients with irregular astigmatism or corneal deformities.
Scleral and Orthokeratology Designs
Scleral lenses; these lenses bear a highly specialized fashion that vaults over the cornea. They rest on the white part of the eye or sclera. This makes them proper for patients with keratoconus or other corneal irregularities. Also, Orthokeratology lenses or Ortho-K lenses are designed to reshape the cornea temporarily. Wearers can benefit from improved vision without needing glasses or regular contact lenses.
Multifocal RGP Design
This design allows wearers to enjoy clear vision at multiple distances. These lenses incorporate various powers in different lens zones, giving presbyopia wearers a solution to see at various distances. This feature reduces the dependency on reading glasses and provides balanced vision.
Kerato Lens Design
Kerato lenses are mainly used in patients with keratoconus. They help improve visual acuity by providing a smoother tear film and corneal surface interface. In addition, the RGP lenses' rigid gas-permeable material helps flatten the conical cornea shape over time. This process helps in the long-term correction of the deformity.
Lens Material and Design
To meet their needs, customers consider the material of the lens and the design suitable for RGP lenses. Gas-permeable materials provide exceptional clarity and comfort to customers with astigmatism or keratoconus by shaping the lens to match the cornea. Customers who require multifocal vision use lenses incorporating different optical powers.
Eye Health Considerations
Buyers who prioritize overall eye health choose RGP lenses for their oxygen permeability. This feature reduces the chances of eye infections and promotes long-term eye health when selecting RGP lenses for corneal irregularities; customers look for lenses with excellent oxygen permeability. Furthermore, customers with sensitive eyes or requiring extended wear benefit from lenses with superior wettability and surface treatment.
Customization Options
Most customers consider RGP lenses for their properties and seek customization options. Buyers understand the importance of having lenses tailored to their unique requirements, such as corneal topography, diopter values, and pupil distances. Their customers expect precise adjustments to ensure optimal vision correction. That is why buyers look for suppliers providing advanced measurement and customization technologies.
Cost and Value
While the prices of RGP lenses vary depending on the brand, various customers also compare the quality of various lenses. The perceived value is determined by factors like durability, vision correction effectiveness, and overall eye health benefits. Retailers consider these elements and opt for affordable yet high-quality lenses to provide customers with the best experience.
Post-Sale Services
Buyers consider the post-sale services of the lenses, such as customer support and warranty, since most customers may require help with their personalized RGP lenses.
Proper maintenance of RGP lenses helps extend their lifespan and maintain ocular health. Further, maintenance of these lenses is very crucial for customers who constantly use them to enjoy a comfortable vision. Below are some guidelines for caring for these kinds of lenses.
Cleaning Products
Contact lens wearers are advised to use specialized RGP lens cleaning solutions. These solutions are designed to disinfect and remove protein deposits from the lens surface. Therefore, users should avoid cleaning their lenses using tap water or saliva, as these could introduce harmful bacteria and result in eye infections.
Daily Cleaning Routine
Users should remove their RGP lenses at the end of each day for those who have RGP lenses they can remove daily and clean the lenses before storing them. They should begin by washing their hands thoroughly, gently rubbing each lens with an approved RGP lens cleaner. They are then advised to rinse each lens with a suitable rinse solution before placing it in a clean lens case filled with fresh storage solution. This process ensures the lenses remain free from deposits.
Storage Solutions
RGP lenses should always be stored in a clean case filled with a proper RGP lens storage solution, as exposure of the lenses to air may result in their dryness and consequent damage. Regular cleaning of the lens case is crucial. One must clean it using boiling water and let it dry completely before placing the lenses back in. It is not advised to use tap or distilled water to rinse the case, as this could result in microbial contamination.
Regular Checkups
For customers using RGP lenses, frequent eye specialist checkups are highly encouraged so that the optician can identify any potential issues early on and prescribe the necessary actions. It is necessary for those with personalized lenses to visit their opticians to confirm that the lenses fit properly and are in good condition. During these visits, the optician can check the lenses for any signs of wear, scratches, or damage. Any damaged or worn-out lenses should be replaced immediately, as using them may affect vision and undermine eye health.
Repairs and Replacement
For users of RGP lenses requiring repairs or adjustments, they are required to seek a qualified eye care professional to repair the lenses further. The optician may recommend replacements if the damage is extreme and advise users to keep a spare pair of RGP sunglasses.
Yes, the RGP lenses provide higher oxygen permeability than soft contact lenses. This property enables RGP lenses to offer better eye health protection and a decreased risk of complications associated with extended contact lens wear.
When properly cared for, RGP lenses can last up to two to three years. It is worth noting that RGP lenses could last even longer, considering their superior durability and resistance to scratches compared to soft lenses.
Those customers with dry eyes will greatly benefit from special RGP lenses with higher wettability and lower surface tension. Additionally, using specific lubricating eye drops for gas-permeable lenses will further minimize dryness and discomfort.
Astigmatism patients can benefit from RGP lenses since they provide excellent correction for astigmatism due to their smooth and uniform optical surfaces. In addition, the precision of the RGPs will result in good visual acuity, particularly in cases of mild to moderate astigmatism.
Some RGP lenses are specially made for overnight or extended wear; these are made from highly oxygen-permeable materials. However, speaking with an eye care professional about the suitability of overnight wear is crucial.
