Various lenses available with us

Rigid Gas Permeable (RGP) Lenses

These are small in diameter corneal lenses ranging from 8.50mm up to even 10.20mm. They were called as Hard Lenses in past, but due to the advancement in materials they are no more hard lenses. Hard lenses did not allow oxygen to pass through it, unlike RGP lenses which is made of a compound containing silicone allows oxygen to pass through the material.

Who can Wear RGP Lenses?

· High Myopia/ Hyperopia/ Astigmatism.

· Very early Keratoconus

· Mild to moderate Astigmatism

· Corneas which are not suitable for Soft Contact Lenses

What are the advantages of RGP lenses?

· RGP lenses last long and are more durable than soft contact lenses.

· They are resistant to deposits as compared to soft contact lenses.

· Clarity of vision is better in RGP lenses

· They tend to be less expensive as compared to Rose K and scleral lenses.

· They are easier to handle and less likely to tear.

· Good amount of tear exchange happens behind the lens.

Scleral Lenses

These are large diameter RGP lenses which vaults over the cornea and rests on the sclera (white potion of the eye). They do not touch the cornea making it one of the most comfortable lens. They are filled with saline to cover the corneal irregularity and keep it moist and comfortable. Based on the various range of diameters available they are named as:

1. Corneo-scleral : 12.90mm to 13.50mm

2. Semi-scleral: 13.60mm to 14.90mm

3. Mini-scleral : 15.00mm to 18.00mm

4. Full scleral : 18.10mm to <24.00mm

Who can wear Scleral lenses?

· Any corneal condition which cannot be corrected with RGP lens.

· Patients having Keratoconus, Keratoglobus, Pellucid Marginal Degeneration or any ectasia.

· Post Radial Keratotomy irregular cornea.

· Post Penetrating Keratoplasty corneal surgery.

· Post LASIK ectasia or any scarring

· Certain corneal dystrophies which has lead to irregularity in cornea.

· High Astigmatism / Irregular corneal Astigmatism.

· Patients having very high Myopia/ Hyperopia.

· Patients having extreme dry eye, Steven Johnson Syndrome. Graft Versus Host Disease, Atopic keratoconjunctivitis.

· Patients who are unable to close their eyelids completely due to eyelid coloboma, ectropion, nerve palsy or post lid retraction surgery.

· Patients having irregular cornea post trauma or post any chemical burn.

What are the advantages of scleral lenses?

· They are custom made lenses and every parameter can be adjusted as per patient’s corneal requirement.

· They do nor rest on the cornea, instead vault over it, which not only makes it comfortable but also reduces the chances of corneal scarring.

· They are very beneficial in healing and protecting the cornea in extreme dry eye patients.

Rose K Lenses

Rose K contact lenses are a type of contact lens that are specifically designed to correct vision in patients suffering from keratoconus, corneal irregularity or post-graft corneal irregularity. These lenses are unique in design and shape, allowing them to provide better vision correction than traditional soft contact lenses or glasses.

In cases where the shape of the cornea is irregular, traditional contact lenses and glasses may not provide the necessary correction needed to improve vision. This is where Rose K contact lenses come in.

The unique design of Rose K contact lenses is what sets them apart from other GP lenses. The lenses have a specifically designed shape that follows the shape of the cornea in patients with keratoconus or irregular corneas. This shape, known as a reverse geometry design, allows the contact lens to vault over the apex of the cone-shaped cornea, creating a more uniform and smooth surface for light to refract through. The reverse geometry design allows for the lens to fit more comfortably on the eye, reducing irritation and discomfort that can be caused by traditional GP lenses that do not fit as well. This results in sharper, clearer vision for patients with keratoconus or irregular corneas.

Rose K contact lenses are gas permeable (GP) lenses, which means they are made of a rigid material that allows oxygen to flow through to the cornea. This is important because it helps to maintain the health of the cornea, which can be compromised by soft contact lenses that do not allow adequate oxygen to permeate through. The rigid material of Rose K lenses also allows them to maintain a specific shape on the cornea, providing the necessary correction to improve vision in patients with irregular corneas.

In addition to keratoconus, Rose K contact lenses can also be used for patients that have undergone a corneal transplant. Post-graft corneas are often irregular in shape, which can make it difficult to find the right fit with traditional contact lenses or glasses. Rose K contact lenses can provide the necessary correction to improve vision in these patients.

Rose K contact lenses are also beneficial for patients that are not able to undergo a corneal transplant or other surgical intervention for keratoconus or irregular corneas. These lenses can improve vision and quality of life without the need for invasive procedures.

Prosthetic Lenses

These are special soft /RGP lenses used to cover up any corneal opacity /cloudiness, iris abnormalities or lens opacities. They can be designed to mimic the color and appearance of a natural iris (The iris is the colored part of the eye that controls the amount of light that enters the eye), helping to improve the overall appearance of the eye, thus enhancing the aesthetic appearance of the patient.

They can also be tinted to reduce glare or adjust the appearance of the pupil, helping to improve vision in bright or low-light conditions. They can also be customized as per patient’s spectacle prescription.

A prosthetic lens is a type of therapeutic lens and are very different from the cosmetic (coloured) lenses.

Individuals with corneal opacities and iris abnormalities may have difficulty seeing clearly due to issues with the color or shape of their iris. When there are abnormalities present, such as a missing or damaged iris, the proper amount of light cannot be controlled, leading to vision problems. Prosthetic contact lenses can help to address this issue by providing a replacement for the missing or damaged iris, improving vision and cosmetic appearance.

Prosthetic contact lenses are generally safe and effective when used under the guidance of a qualified eye care professional. Proper fitting and maintenance of the lenses is essential for optimal vision and comfort. Regular visits with an eye care professional can help to ensure proper use and care of the lenses, as well as monitor for any potential complications.

Who can wear prosthetic lenses?

· Patients which any type of Corneal Opacity or Scarring, Micro cornea, Band Keratopathy.

· Patients with Heterochromia (Different colour eyes in same person), Aniridia (Absence of iris), Coloboma (Missing part of the iris), Polycoria (Multiple pupils).

· Patients having Leukocoria (White pupillary reflex).

· Patients having diplopia die to multiple iris holes post-surgery and photophobia.

What are the advantages of prosthetic lenses?

· It enhances the aesthetic appearance of the face making patient more confident.

· It can help in cutting out excessive light entering the eye thus reducing photophobia and diplopia in some cases.

· One of the major benefits of prosthetic contact lenses is their ability to provide a non-surgical alternative to other treatments for corneal opacity or iris abnormalities.

X Chrome Lenses

X Chrome contact lenses are a revolutionary development for those who suffer from color vision deficiency (CVD). CVD, also known as color blindness, is a condition where a person's eyes have trouble distinguishing colors. This can make it difficult for them to perform everyday tasks, such as cooking or driving.

One of the most common forms of CVD is red-green color blindness. People with this condition have trouble distinguishing between red and green colors. X Chrome contact lenses address this issue by altering the way that light is perceived by the eye. They work by filtering out certain wavelengths of light, allowing those with CVD to see colors more clearly. They can enhance the vibrancy and clarity of colors, making the world around us even more beautiful.

The X Chrome contact lenses are available in both daily wear and extended wear versions. This means that you can choose the option that works best for your lifestyle. They are also available in a range of prescriptions, making them accessible to a wide range of people. The lenses are easy to insert and remove and come with detailed instructions to ensure proper use.

One of the most exciting aspects of X Chrome contact lenses is their potential to improve the lives of those with CVD. Studies have shown that color vision deficiency can impact a person's ability to perform certain tasks, particularly in the workplace. For example, electricians and engineers with CVD may struggle to distinguish between color-coded wires, which can be a safety hazard. X Chrome contact lenses could potentially improve the safety and efficiency of these workers by allowing them to see colors more clearly.

Overall, X Chrome contact lenses are an exciting development in the field of vision correction. They have the potential to improve the lives of those with CVD.

Paediatric Aphakic Lenses

Paediatric Aphakic contact lenses are a type of specialized contact lens used to improve vision in children who have undergone cataract surgery at a young age.

Cataracts are clouding of the normally clear lens in the eye, which can greatly impact vision. Cataracts can interfere with normal visual development in children, leading to vision problems that can persist even after the cataract is removed.

Normally, cataract surgery involves removing the cloudy lens and replacing it with an artificial lens implant. However, in children under the age of 2, it is often not possible to implant a lens due to the child's developing eye. This leaves the child without a clear lens, a condition known as aphakia. Since a clear lens is essential for normal vision, children with aphakia may have difficulty seeing clearly and developing normal visual skills.

Glasses can be difficult for young children to wear and can interfere with normal development, while IOLs are not always a viable option in young children. Contact lenses provide a safe and effective alternative that can improve vision and quality of life without the need for surgery.

Paediatric Aphakic contact lenses can help to address these issues, providing clear vision and promoting healthy visual development.

These lenses are custom made to fit the unique shape and needs of each child's eye, ensuring a comfortable and effective fit.

There are several types of paediatric aphakic contact lenses, each with their own advantages and disadvantages. Rigid gas-permeable lenses (RGP) are a popular choice as they provide excellent optics and are highly durable. However, they can be difficult to fit and may not be as comfortable as other types of lenses.

Soft contact lenses, on the other hand, are more comfortable and easy to fit as compared to RGP lenses.

One of the major benefits of paediatric aphakic contact lenses is their ability to provide a non-surgical alternative to other treatments, such as glasses or intraocular lenses (IOLs).

Paediatric aphakic contact lenses are generally safe and effective when used under the guidance of a qualified eye care professional. Proper fitting and maintenance of the lenses is essential for optimal vision and comfort. Regular visits with an eye care professional can help to ensure proper use and care of the lenses, as well as monitor for any potential complications.

While paediatric aphakic contact lenses can greatly improve vision and quality of life for children with aphakia, they may not be suitable for everyone. Children with certain medical conditions or allergies may not be able to wear contact lenses, and those with severe or complex vision issues may need to explore other options. It is important to consult with an eye care professional to determine the best course of treatment for each individual case.

In conclusion, paediatric aphakic contact lenses are a valuable tool in the treatment of aphakia in children. They provide a non-surgical alternative to other treatments, and can greatly improve vision and promote healthy visual development. With their range of options and customization, paediatric aphakic contact lenses offer a safe and effective solution for a wide range of young children with vision issues.