Dr. John Sarkar – Cornea, Cataract and LASIK Surgeon in Kolkata

Dr. John Sarkar is a Consultant Ophthalmologist associated with Fortis Hospital & Kidney Institute in Kolkata. Fortis Healthcare lists 17 years of experience in Ophthalmology. His professional focus includes corneal diseases, cataract surgery, refractive procedures and advanced techniques for restoring and improving vision.

Dr. John Sarkar holds MBBS, DO, MS in Ophthalmology and FMRF Cornea qualifications. He completed his MBBS at R. G. Kar Medical College in Kolkata, ophthalmology diploma training at the Regional Institute of Ophthalmology, and MS in Ophthalmology at Assam Medical College, Dibrugarh.

Dr. Sarkar pursued specialised training in Cornea and Refractive Surgery at Sankara Nethralaya in Chennai between 2013 and 2015. He subsequently worked as an Associate Consultant in Cornea, Cataract and Refractive Services at Sankara Nethralaya in Chennai and Kolkata from 2015 to 2018.

His professional experience also includes serving as Senior Consultant at Susrut Eye Foundation and Research Centre in Kolkata until March 2025. His published professional biography reports experience with more than 2,000 phacoemulsification procedures and over 1,000 corneal transplantation procedures during his work there.

As an ophthalmologist in Kolkata, Dr. John Sarkar focuses on conditions affecting the cornea, natural lens and ocular surface. His specialist practice includes evaluation and surgical treatment of selected conditions that cause blurred vision, reduced visual clarity or corneal damage.

Cataract surgery is one of Dr. Sarkar's documented areas of expertise. Cataracts develop when the natural lens of the eye becomes cloudy, potentially causing blurred vision, glare and difficulty with daily activities. Surgical treatment replaces the cloudy lens with an artificial intraocular lens.

Dr. John Sarkar has experience in phacoemulsification cataract surgery and the use of premium intraocular lenses, including multifocal and toric lens options. The choice of lens depends on eye measurements, corneal health, visual requirements and the patient's suitability.

Corneal transplantation is another major area of Dr. Sarkar's clinical expertise. Corneal transplantation may be considered when disease, injury or scarring significantly affects corneal transparency or function and less invasive treatments are insufficient.

His documented corneal transplant techniques include penetrating keratoplasty, deep anterior lamellar keratoplasty, Descemet stripping endothelial keratoplasty and Descemet membrane endothelial keratoplasty. These procedures address different layers and types of corneal disease.

Penetrating keratoplasty involves replacing the full thickness of a damaged cornea with donor tissue. It may be considered for selected cases of advanced corneal scarring, structural damage or disease involving multiple corneal layers.

Deep anterior lamellar keratoplasty, or DALK, replaces diseased anterior corneal tissue while preserving healthy inner layers when clinically suitable. This approach can be considered for selected corneal conditions where the endothelium remains functional.

Endothelial keratoplasty techniques such as DSEK and DMEK replace damaged inner corneal tissue. Dr. Sarkar's professional website identifies these advanced corneal transplantation techniques among his clinical interests and surgical experience.

LASIK surgery is among Dr. John Sarkar's documented refractive procedures. LASIK uses laser technology to reshape the cornea in suitable patients with refractive errors such as myopia, hyperopia and astigmatism. Eligibility requires detailed preoperative eye assessment.

Photorefractive keratectomy, commonly known as PRK, is another laser vision correction procedure included in Dr. Sarkar's professional profile. PRK may be considered in selected patients based on corneal measurements and individual visual requirements.

Corneal collagen cross-linking is used to strengthen corneal tissue in selected progressive corneal disorders, including keratoconus. Dr. Sarkar's clinical profile identifies corneal cross-linking, also described as CXL or C3R, among his treatment interests.

Phakic intraocular lens implantation is another refractive procedure listed in Dr. Sarkar's professional biography. It may be considered for selected patients with refractive errors who are not suitable candidates for conventional corneal laser procedures.

Dr. John Sarkar has received recognition for ophthalmic research, surgical presentations and educational contributions. His professional website lists the Best Thesis Award in 2011, recognition for corneal research in 2014, several surgical video awards and the Young Ophthalmic Teacher of India recognition in 2024.

Dr. John Sarkar is associated with Fortis Hospital & Kidney Institute in Kolkata and also lists consultation locations through his professional website. Patients seeking a cornea specialist, cataract surgeon or LASIK surgeon in Kolkata may contact the relevant hospital or clinic to confirm appointments, available procedures and suitability for treatment.

Cataract Surgery

Dr. John Sarkar specialises in cataract surgery, which involves removing the cloudy natural lens and replacing it with an artificial intraocular lens to improve vision.

Phacoemulsification Cataract Surgery

Phacoemulsification uses ultrasound technology to break up and remove a cataract through a small incision before intraocular lens implantation.

Premium Intraocular Lens Implantation

Premium intraocular lenses may be considered during cataract surgery to address individual visual requirements and certain refractive errors.

Multifocal IOL Implantation

Multifocal intraocular lenses are designed to provide vision at more than one distance in suitable cataract surgery patients.

Toric IOL Implantation

Toric intraocular lenses can help correct selected amounts of corneal astigmatism during cataract surgery.

Corneal Transplantation

Corneal transplantation replaces damaged or diseased corneal tissue with donor tissue to treat selected conditions affecting corneal clarity or function.

Penetrating Keratoplasty

Penetrating keratoplasty is a full-thickness corneal transplant used for selected cases of advanced corneal disease or scarring.

Deep Anterior Lamellar Keratoplasty

DALK replaces diseased anterior corneal layers while preserving healthy endothelial tissue when clinically appropriate.

DSEK Corneal Transplant

Descemet stripping endothelial keratoplasty replaces damaged endothelial tissue and associated posterior corneal layers.

DMEK Corneal Transplant

Descemet membrane endothelial keratoplasty is a specialised procedure that replaces diseased corneal endothelial cells and Descemet membrane.

Ultra-Thin DSEK

Ultra-thin DSEK uses a thinner donor corneal graft for selected patients with endothelial dysfunction.

LASIK Eye Surgery

LASIK is a laser vision correction procedure used to treat selected refractive errors, including myopia, hyperopia and astigmatism.

PRK Laser Eye Surgery

Photorefractive keratectomy reshapes the corneal surface using an excimer laser to correct suitable refractive errors.

Corneal Collagen Cross-Linking

Corneal collagen cross-linking is used to strengthen the cornea and reduce progression in selected cases of keratoconus or corneal ectasia.

Keratoconus Treatment

Keratoconus management may involve monitoring, specialised contact lenses, corneal cross-linking or surgical treatment depending on disease severity.

Phakic IOL Implantation

Phakic intraocular lenses may correct selected refractive errors while preserving the eye's natural crystalline lens.

Ocular Surface Disorder Treatment

Ocular surface treatment addresses conditions affecting the corneal and conjunctival surfaces, with management tailored to the underlying diagnosis.

Corneal Scarring Treatment

Corneal scarring may affect vision and require evaluation for medical treatment or surgical restoration depending on its location and severity.

Corneal Injury Assessment

Corneal injuries require assessment of tissue damage, infection risk and possible effects on vision to guide appropriate treatment.

Refractive Surgery Consultation

Refractive surgery consultation assesses eye health, corneal thickness, prescription stability and suitability for LASIK, PRK or other vision correction procedures.