Scleral Contact Lenses
I am writing to say how pleased I am with the Corneal Refractive Therapy (CRT)/Ortho-K lenses that you prescribed for me just over 5 years ago now. I have tried many monthly contact lenses as well as daily contact lenses, but always suffer from dry eyes and blurry vision towards the end of the day. As I use a computer during the day my eyes do tend to dry out a bit. However, since using CRT lenses that I wear during the night this is no longer a problem for me. When I am playing sport like squash or I am surfing I really notice the difference, I have clear vision without having to worry about my lenses falling out. I have thought about laser surgery, but don’t feel that my eyes are bad enough to take the risk, these lenses offer me the same benefit without the risk. I have made the lenses suit my lifestyle and if I go out and decide that I don’t want to wear the lenses for a night, my vision is still usually good enough the following day. I still keep my glasses as a back up when I need them and even daily lenses for if I go away. The lenses have made a big difference to my daily life and I am very happy to be using them.
Extract of letter from an Consultant Opthalmic
Surgeon regarding a patient:
'Astonishing result. I am very impressed with the
improvement. He is a very happy young man as well.'
Extract of letter from PAPA:
'Thank you very much for persuading me to get a pair
of Scleral Contact Lenses. Although they are large
I find them extremely comfortable and my visual stability
had greatly improved.'
Extracts of email from D/MG:
'Never ever seen so clearly - i can now enjoy watching
football even if the other team win !'
'I can swim with my eyes open'
'My lens never fall out any more'
To whom it may concern.
I was fitted with a new scleral lens by my Optician
Mr Sam Silver appros. 2 months ago. I was first diagnosed
with Keratoconus 7 years ago and this new lens has
given me great benefits. The initial period of getting
used to the much larger lens is very manageable and
it took a period of 2 to 3 weeks for me to become
fully comfortable with insertion and removal.
I have outlined some of my thoughts on these lenses
below and would not hesitate to recommend them to
anybody in my situation.
Benefit of scleral lens:
Greater Stability of Vision
- Better all round vision due to less movement of
- Less strain on the eye as vision does not shift.
- More inclined to wear for a longer period as vision
Greater Comfort of Wear
- Compared to rigid gas permeable lens much lens
- No irritation of lens on the eyelid.
- As cornea is untouched, no scratchy or gritty
feeling from eye.
- The eye is much more comfortable with no problems
from either excessive tears or dry eyes which gives
the wearer better vision for longer periods.
- Durable and easier to handle than normal RGP lens
for cleaning and maintenance.
- No chance of lens being lost accidentally.
- Much more practical for sports and outdoor activities
- Much better for night driving - large decrease
in the halo effect.
MR SHERAZ M DAYA
MD FACP FACS FRCS(ED)
Consultant Ophthalmic Surgeon
20 October 2003
Mr Sam Silver
Contact Lens Optician
Thank you for your kind referral whom I saw in consultation
today. As you indicate this gentleman who has a history
of atopy and allergic Rhinitis does indeed have keratoconus
in both eyes, worse in his right.
At examination today with his contact lenses in place
his visual acuity were 6/6 right eye and 6/9.5 -2
left eye. The scleral fit in his left eye was excellent
with good limbal clearance and apical touch. There
were minimal striae present centrally which is not
surprising based on the fact that he has keratoconus.
There did not appear to be any neovascularisation
present. I enclose a copy of his corneal topograpyfor
your records. The rest of his examination was otherwise
With regards to further management, as he is tolerating
his scleral lens and has good vision, he should maintain
using this modality . Should he develop neovascularisation
or problems with retention of the lens then one might
have to consider surgical options. My initial favoured
option based on the appearance of his cone would be
insertion of Ferrara rings and should this fail then
one could consider a deep anterior lamellar therapeutic
keratoplasty. I do not believe he is anywhere close
to having either of these procedures presently.
I have not made arrangements to see him again in
follow-up however shall be more than happy to do so
should the need arise.
With many thanks and kind regards
Sheraz M Daya, MD FACP FACS FRCS(Ed)
Director and Consultant Ophthalmic Surgeon
Corneoplastic Unit and Eye Bank