TransPRKLASIKReLEx SMILEImplantable Collamer Lens (ICL)
Track Record Since1992
Longest track record
19942012
Shortest track record
1993
Procedure Time Per Eye3-5 mins per eye (fastest)15 to 20 min10 to 15 min20 to 30 min (Slowest)
Corneal Thickness CriteriaCornea must be at least 475 microns thick.
Better for thin cornea.
Cornea must be at least 500 microns thick.Cornea must be at least 500 microns thick.N.A
No corneal thickness requirements (ICL is not a corneal based procedure).
Degree
Correction
Criteria (Based on average corneal thickness of 550 microns
Myopia: Up to 1,000 deg Hyperopia: Up to 400 deg Astigmatism: Up to 500 degMyopia: Up to 800 deg Hyperopia: Up to 400 deg Astigmatism: Up to 500 degMyopia: 200 to 700 deg ONLY Hyperopia: N.A.
Astigmatism: Up to 500 deg
Myopia: Up to 1,800 deg Hyperopia: N.A. Astigmatism: Up to 600 deg
ʻNo Eyeball Touchʼ Surgery?YesNo
A suction ring with high pressure is applied.
No
A suction ring with medium pressure is applied.
No
A small side incision is made for insertion of the lens.
InvasivenessLeast invasive
True no-cut surface-based procedure.
Moderately invasive
LASIK takes place beneath a cut corneal flap.
Minimally invasive
ReLEx SMILE takes place via a removed lenticule ('internal flap')
Most invasive
ICL is inserted inside the eye, beyond the cornea and deep behind the pupil.
Flap-Related/lenticule ('internal flap') complications?No
Zero flap-related complications since no corneal flap cut at all.
Yes
This include: flap dislodgement, flap wrinkles, flap inflammations and flap interface problems.
Yes. Lenticule ('internal flap') complications can occurN.A.
The ICL procedure is not a corneal based surgery.
Dry Eyes?Least likely
TransPRK is a surface- based procedure with no nerve endings being cut, greatly reducing the
risk of dry eyes.
Most likely
Thousands of cornea nerve endings are cut when the cornea flap is created, resulting in the risk of permanent LASIK-induced dry eyes.
Moderately likely
There is no big external cut made in the cornea, thus incidence of dry eyes is lower compared to LASIK.
N.A.
The ICL procedure is not a corneal based surgery.
Ability To Achieve True Wavefront/ Topographical CorrectionYesNo
The cut corneal flap during Lasik will introduce new Wavefront & Topographical errors.
No
Current technology unable to correct Wavefront/ Topographical errors.
No
There is no wavefront-enabled ICL.
Ability To Do Crosslinking To Prevent Future Corneal Thinning Problem i.e. KeratectasiaYes
Can be incorporated in TransPRK procedure.
Yes
Can be incorporated in LASIK procedure.
No
Cannot be incorporated in ReLEx SMILE procedure.
No
Cannot be incorporated in ICL procedure.
Can Go Back To Work4 to 5 days2 to 3 days2 to 3 days2 to 3 days
Full Visual RecoverySlower
Generally takes around 1 to 3 months.
Fast
Generally take 2 to 3 weeks.
Slower
Generally takes about 1 to 3 months.
Fast
Generally take 2 to 3 weeks.
Resume Light Sports e.g. Jogging, Gym, Cycling5 days5 days5 days5 days
Can Do More Active Sports e.g. Swimming, Diving, Bungee Jumping, Football2 weeks
(Important to avoid sun’s uv rays for 6 to 10 weeks)
1 month1 month3 month
Participate In Rugged And Contact Sports2 weeksIt is not advisable to participate in contact sports as the cut corneal flap will never fully heals.3 monthsIt is not advisable to participate
in contact sports as the ICL may dislodge or injure internal structures.
Nutshell SummaryGood for anyone who prefers
a safe surface-based procedure. Suitable for active sportsperson, especially those participating in contact sports. Suitable for those who are risk adverse to corneal flap complications, wish to minimise risk of dry eye, have
thin cornea and high myopia, and those who are afraid of having their eyes cut can also consider TransPRK. Very important to avoid the sun’s uv rays for two months post-op and to use the recovery eye drops provided for six to ten weeks depending on the eye power corrected.
Good for those who wish to have a fast visual recovery. Not suitable for those who are risk adverse to the cut corneal flap complications. Not suitable for those who wishes to participate in contact sports, or suffer from dry eye, or who have a fear of having their cornea cut.An improvement over LASIK, in that it does not cut an open flap, and thus, lowers the risk of flap- related complications and dry eyes. However, visual recovery is slower. ReLEx SMILE cannot perform Wavefront and Topographical corrections, also no adjunct cross- linking can be done at same time to strengthen thin cornea. If fine- tuning enhancement is needed in the future, it is done using ASA techniques like TransPRK. Accuracy is a concern for those with high astigmatism. Lenticule ('internal flap') flap complication is a concern for those with low myopia.This is the most invasive procedure as it is an intra-ocular procedure. It increases the risk of developing cataracts and glaucoma. There is a real 1 in 1,000 eyes fear of the eye going fully blind from a bad post-op infection. Hence, in my opinion, it is an option to consider only for those patients who are found to be not suitable for cornea-based laser vision correction procedures. e.g. patients, with very thin cornea, high refractive errors or cornea scarring.
Cost For
Two Eyes *Prices indicated are inclusive of 7% GST
$3,888 at Clearvision Eye Clinic and LASIK CentreFrom $3,450 at Eagle Eye Centre; from $3,198 at LSC Eye Clinic; from $2,996 at Singapore National Eye Centre (SNEC)From $5,659 at LSC Eye Clinic; from $4,682 at SNECFrom $12,262.20 at SNEC