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Keratoconus is a progressive eye condition characterized by the thinning and bulging of the cornea, leading to visual impairment. The Khanna Vision Institute offers several advanced surgical treatments to manage and treat keratoconus, including CAIRS and CTAK.

CAIRS and CTAK Treatments at Khanna Vision Institute

The Khanna Vision Institute, led by Dr. Rajesh Khanna, is a pioneer in advanced treatments for keratoconus, including CAIRS (Corneal Allogenic Intrastromal Ring Segments) and CTAK (Cross-Linking, Topography-Guided PRK, and Keratoplasty). These innovative procedures provide effective solutions for managing and treating keratoconus, especially in advanced cases.

CAIRS (Corneal Allogenic Intrastromal Ring Segments)


CAIRS is designed to provide structural support to the cornea and stabilize its shape, thereby improving vision in patients with keratoconus.


Preparation: Detailed corneal topography is performed to determine the specific requirements for ring segment placement.

Implantation: Allogenic (donor) corneal tissue is fashioned into ring segments.

Insertion: These segments are surgically implanted into the corneal stroma (the middle layer of the cornea).


Structural Stability: The implanted ring segments provide additional support to the corneal structure, helping to maintain a more regular shape.

Visual Improvement: By flattening the cornea, CAIRS can significantly enhance visual acuity.

Minimally Invasive: The procedure is relatively low-risk and can be an alternative to more invasive surgeries.

CTAK (Cross-Linking, Topography-Guided PRK, and Keratoplasty)


CTAK is a comprehensive treatment approach that combines three different procedures to address both the structural integrity and visual acuity issues associated with advanced keratoconus.


  1. Cross-Linking (CXL):

Goal: Strengthen the corneal structure to halt the progression of keratoconus.

Method: Riboflavin drops are applied to the cornea, followed by exposure to UV light to induce collagen cross-linking.

  • Topography-Guided PRK (Photorefractive Keratectomy):

Goal: Reshape the corneal surface for improved vision.

Method: The epithelium (outer layer of the cornea) is removed, and an excimer laser is used to reshape the underlying tissue based on precise topographic maps.

  • Keratoplasty (Corneal Transplant):

Goal: Replace severely damaged or irregular corneal tissue.

Method: Depending on the severity, either partial (lamellar) or full-thickness (penetrating) corneal transplant is performed.


Comprehensive Treatment: By addressing both the mechanical and optical aspects of keratoconus, CTAK offers a comprehensive solution.

Vision Restoration: Significant improvement in visual acuity can be achieved, especially in cases where other treatments may not be sufficient.

Long-Term Stability: The combination of cross-linking and structural support from keratoplasty ensures long-lasting stabilization of the cornea.

Khanna Vision Institute: Expertise and Personalized Care

Dr. Rajesh Khanna and his team at the Khanna Vision Institute are recognized for their expertise in treating keratoconus using these advanced methods. Here are some key features of the institute.

Personalized Treatment Plans: Each patient receives a tailored treatment plan based on the severity and specific characteristics of their keratoconus.

State-of-the-Art Diagnostic Tools: Advanced technology is used for accurate assessment and mapping of the cornea, ensuring precise treatment.

Innovative Techniques: Specializing in innovative procedures like CAIRS and CTAK, the institute provides effective solutions for even the most challenging cases.

Comprehensive Care: From diagnosis through post-operative care, patients receive thorough and compassionate care aimed at achieving the best possible outcomes.

The Khanna Vision Institute offers advanced and effective surgical treatments for keratoconus, with CAIRS and CTAK standing out as innovative approaches to managing this condition. These treatments aim to stabilize the cornea, enhance vision, and provide long-term benefits to patients suffering from keratoconus. With personalized care and cutting-edge technology, the Khanna Vision Institute remains at the forefront of keratoconus treatment.