Consultant: Sajjad Ahmad2019-03-11T11:46:43+00:00

Sajjad Ahmad is a London Harley Street Cataract and Corneal Surgery Specialist

Sajjad Ahmad MBBS, FRCOphth, PhD

Consultant Ophthalmic Surgeon – Cornea & External Eye Diseases, Cataract & Refractive Surgery Specialist

  • Areas of expertise: Cornea, Cataract and External Eye Diseases
  • GMC Reg no: 4409012

  • Consultant’s CV: Download CV here


  • 2016: Honourary Senior Clinical Lecturer, Institute of Ophthalmology, UCL
  • 2013: Honorary Consultant Ophthalmic Surgeon, St Paul’s Eye Unit, Liverpool
  • 2013: Honorary Senior Clinical Lecturer, University of Liverpool


  • Fellow of the Royal College of Ophthalmologists (UK)

  • European Society for Cataract and Refractive Surgeons
  • Association for Research in Vision and Ophthalmology

Languages Spoken

  • English

  • Urdu

  • Hindi

  • Punjabi

Call to book a consultation with Mr Ahmad on: 020 7935 7990

Give us a call and we can help you clarify which treatment options are best for you. Alternatively, please click the button below to request a consultation:

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Sajjad Ahmad, Clinical Academic Ophthalmologist

Sajjad Ahmad is an expert in

  • ocular surface and corneal inflammatory disease
  • ocular surface/corneal/anterior segment reconstruction of the eye.

Sajjad Ahmad undertook specialist corneal fellowships at St Paul’s Eye Unit (Liverpool) and Moorfield’s Eye Hospital (London).

His mix of research and clinical experience has been vital to translate some of his laboratory research findings into the treatment of debilitating eye diseases of the cornea and the ocular surface.

These clinical applications include developing a technique to grow stem cells from the surface of the cornea to successfully treat patients blinded by burns and other diseases affecting the surface of the eye.

He has developed a culture system for human corneal epithelial stem cells that researchers have successfully used in national clinical trials. Mr Ahmad is currently the UK chief investigator for a new European clinical trial for these corneal stem cells.

Because he participates in research in translational stem cell biology for corneal diseases and inflammatory eye diseases, Mr Ahmad is an expert in inflammatory eye diseases. He also treats many cases of the other ocular surface and cornea conditions.

At Clinica London, Mr Sajjad Ahmad is a Consultant specialising in Cornea & External Eye Diseases and Cataract & Refractive Surgery.

Treatments that Sajjad Ahmad performs at Clinica London

Corneal Disease

  • Corneal Transplantation
  • Keratoconus Treatment

General Ophthalmology

Keratoconus treatment

Keratoconus is a degenerative condition affecting the cornea at the front of the eye. As a result of changes to the cornea, the corneal shape progressively becomes more cone-like. This shape change results in poor focusing of light and reduced vision.

Risk Factors:

  • Eye rubbing
  • Allergic eye disease
  • Some genetic diseases such as Downs Syndrome


In early keratoconus, patients can typically normalise reduced vision with glasses or contact lenses.

As keratoconus continues to advance, Mr Ahmad advises a treatment called Corneal Collagen Cross-linking (CXL) to prevent worsening.

CXL aims to stabilise the keratoconus. We can determine the extent and progression of any keratoconus using eye scanning technology known as corneal topography. This technology assesses the shape of the cornea.

In advanced keratoconus, either contact lenses cannot fit the corneal shape, or the cornea becomes scarred. Both these situations result in poor vision. In these cases, Mr Ahmad offers corneal transplantation to improve vision and enable contact lens wear.

Corneal collagen cross-linking treatment

CXL treatment aims to prevent the progression of keratoconus and hence the need for a corneal transplant.

The CXL procedure

Mr Ahmad carries out the CXL procedure with anaesthetic eye drops. CXL treatment involves removing the fine surface layer of the cornea known as the epithelium. Then, we apply Riboflavin drops to the cornea and expose the eye to ultraviolet light. The first 24 hours of the procedure can often result in pain and irritation from the eye affects adolescents and young adults.

Potential risks of CXL

The benefits of CXL outweigh the risks in progressive keratoconus. The rare risks include corneal infection and corneal haze.

Post-procedure treatment

We advise patients to take a few days off after the procedure to enable recovery. They can resume contact lens wear once the corneal epithelium heals. We give antibiotic eye drops, anti-inflammatory drops and lubricant eye drops after the procedure.

Dry Eye Disease and its treatment

Dry eye symptoms are common and can have a significant impact on everyday activities. If severe enough, the symptoms can result in physical signs of drying of the front surface of the eye and this can result in reduced vision or infections.

The two main types of dry eye disease are:

  • Poor tear production or aqueous deficient dry eye disease (ADDED)
  • Increased tear evaporation or evaporative dry eye disease (EDED)

Several conditions can result in poor tear production

  • the use of certain medications after laser refractive surgery,
  • inflammatory diseases (such as rheumatoid arthritis or Sjogren’s syndrome) and
  • scarring of the tear (lacrimal) gland ducts.

A significant cause of increased tear evaporation is meibomian gland dysfunction, commonly called blepharitis. The surface of the tear film stabilises by a fine layer of oils produced by the meibomian glands of the eyelids. If these glands become blocked, the oily layer does not build on the tear film, and the tears evaporate. Other conditions resulting in evaporative dry eye disease include environmental causes such as air conditioning and poor blinking or closure of the eyelids.


We personalise the treatment of any dry eye disease to each patient’s symptoms and their everyday activities. Our treatment plans involve a stepped approach.

Treatment of ADDED

  • Lubricant eye drops, gels and ointments
  • Anti-inflammatory eye drops such as ciclosporin
  • Temporary punctal plugs to prevent drainage of any tears produced
  • Sometimes, tablets to increase tear production, such as pilocarpine

Treatment of EDED

  • Lubricant eye drops, gels and ointments
  • Warm compresses to help unblock the meibomian glands of the eyelids
  • Short or long term courses of low dose antibiotics (doxycycline, erythromycin or azithromycin)

Allergic Eye Disease and its treatment

Allergic eye disease can be seasonal (such as hayfever) or all year round (atopic conjunctivitis). There are specific risk factors for allergic eye disease such as eczema or asthma, but these are not present in all cases. The main symptoms are redness, watering and itching of the eyes.

In rare cases, the cornea at the front of the eye can be affected, and this results in reduced vision. In children, there is a rare form of allergic eye disease known as vernal conjunctivitis.


  • Cooled lubricant eye drops
  • Anti-allergy eye drops and tablets
  • Anti-inflammatory eye drops such as ciclosporin

Corneal Transplantation

The cornea is the clear front of the eye and is essential for the transmission and focusing of light on the retina so that we can see.

There are several reasons patients may need a corneal transplant:

  • Corneal scarring, e.g. from corneal infections or sharp injuries
  • Genetic corneal dystrophies, e.g. lattice, granular or macular corneal dystrophies
  • Abnormal corneal shape, e.g. keratoconus
  • Melting or perforation (the development of a hole) in the cornea, e.g. in rheumatoid arthritis or from injuries
  • Corneal swelling, e.g. Fuchs endothelial corneal dystrophy

Corneal transplantation involves removing the diseased and transplanting a cornea from someone who has kindly donated their eyes for transplantation after they die.

Because the transplanted cornea is from someone else, there is a potential risk of transplant rejection. We use anti-rejection eye drops or (rarely) tablets to reduce this risk. Occasionally, taking these tablets can be lifelong.

There are several types of corneal transplantation. The conventional type of corneal transplantation that is necessary for some diseases involves transplanting all the layers of the cornea. This type is called a penetrating keratoplasty (PKP) and requires several stitches to the eye. Full visual rehabilitation after a PKP can take up to a year.

Sometimes,  we use more recently developed transplantation methods if suitable. The newly developed methods correlate with a speedier visual recovery and reduced rates of transplant rejection. These include:

  • Deep anterior lamellar keratoplasty (DALK) in keratoconus that involves transplanting the front layers of the cornea. This type of transplant requires several stitches to the secure the new cornea.
  • DSAEK or DMEK corneal transplants that involve replacing the back layer of the cornea in Fuchs endothelial corneal dystrophy. These transplants require us to use air in the eye to hold the transplant in place for a few days to give it time to attach on its own.


Here’s what they say

“Dr. Jane Olver was fantastic! She was so caring and sweet and it was clear that she knew what she was doing – very professional! I am absolutely over the moon with my results now!”

Toni C.

“Jane Olver is your woman – I wish I had found her at the start. I will be forever grateful for her care and expertise.”

Nancy W.

“Just wanted to thank you for your exceptional assistance with my eye condition. I was so worried but you really helped me feel at ease.”

David T.

“I felt much better after speaking to you and being reassured. I am much calmer and actually got some sleep last night.”

Catherine M.
“I was deeply impressed by the politeness and empathy shown to me. I found the surgery very peaceful and beautifully decorated and I hope to see Jane again soon.”
Jeffrey W.
“I highly recommend Jane Olver. The whole experience was calm and highly professional.”
Lorraine M.
“I am writing to you to say thank you to you, Cloe and Jane for taking care of me this week. You were all really lovely and professional and I am very grateful. Big cheer for The Clinica London Team.”
Rick A.
“Many thanks for taking care of my ptosis surgery today. I am now back home and resting but wanted to send a quick note to thank you for taking such good care of me.”
“The treatment was a great success; within 24 hours of starting the treatment the pain and swelling subsided and as a result, I was able to enjoy a great holiday in Argentina.”
“Thank you, my eye is recovering brilliantly (you almost can’t see I had it). Jane was amazing, please pass on a huge thank you.”

“What I loved most was her willingness to take my knowledge of my disease and experience into consideration. I am very impressed and feel lucky to be in her care.”
Fiona M.
“Dr. Crawley is always in such a good mood and always does her utmost to help. Best doctor I have ever seen!”
Matthew K.
“Dr. Crawley has a wonderful manner, is clearly knowledgeable and is an asset to the hospital.”
Lisa A.
“It was a pleasure to be there, the premises are excellent and the professionalism and care that was extended to me were equally excellent. I can’t fault any part of the process whatsoever and am pleased that the procedure seems to have been successful.”
Rob Swallow
“Thank you for your help during the year.”
Julia S.
“Just a quick note for saying thanks for looking after my Mum so wonderfully as she was very worried about the appointment and you really made such a big difference to the experience.”
Sven K.

“Thank you very much for seeing me yesterday, you were marvellous and a pride to the NHS.”

Mariah P.
“I was treated with great courtesy and kindness, and everything was explained to me in layman’s terms so I could fully understand my condition. I was immensely impressed.”
“Many thanks to Mr Khan. His prompt diagnosis and explanation was very reassuring indeed.”
Heather M.
“Dr Khan and Ingrid both put me at ease, talked me through the procedure, the aftercare, gave general tips/advice for maintaining a healthy/clean eye and were really friendly, whilst being professional throughout.”

“Just keep up the good work Dr. Khan. My wife, who accompanied me, and I were both very impressed by the care and consideration shown by the whole team when I had surgery. The care of this team has made it a wonderful experience for me.”
David S.
“Ever since my first consultation with you, the caring dedication and understanding I have received from you has been priceless. Thank you with all my heart. Wishing you a healthy and happy future.”
Doreen S.
“We left with a much greater understanding of the issues involved with genetic testing. It was also very helpful and reassuring to see Dr. Amar again and be introduced to Jonathan the genetic counselor.”
Rachael S.
“On behalf of my mother as well as myself, I would like to thank you for the consultation we had with you last Friday regarding my Usher Type 2/ RP condition. The knowledge and advice you shared with us was much appreciated.”
Chris B.
“Your caring attitude and honest approach to help relieve my problem and find the best solution is overwhelming. And it is with this in mind we would like to express our sincere thanks for everything you have done for me.”
Maurice K.


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