How TransPRK is Done?
TransPRK is a revolutionary laser vision correction that is safe and minimally-invasive as it is surface-based. Here’s a simple step-by-step explanation of how TransPRK procedure is done:
Patient lies down and simply looks ahead at a blinking fixation green light. No suction ring nor surgical instrument touches the eye.
Epithelium cells are removed with the Schwind Amaris 1050RS laser.
10 Advantages of TransPRK
1. No Cut, No Flap (Thus No Fear Of Cutting The Cornea) & Eliminates Risk Of Flap Dislodgement
The most feared and common complication of flap-based surgeries, such as LASIK & ReLEx SMILE, are flap-related problems, such as flap dislodgement, flap wrinkles and flap misalignment, as well as flap interface problems, such as the Sands of Sahara (where there is an inflammation between the corneal flap and stroma) and epithelial ingrowth (where epithelial cells invade the space between the corneal flap and stroma).
Even though the risk of flap-related problems are touted as low, they are a real and present fear. As TransPRK is fully surface-based and does not cut a cornea flap, there is ZERO RISK of flap-related complications.
2. True Surface-Based Procedure (Hence Minimally-Invasive & Less Weakening Of The Cornea)
As TransPRK is surface-based and minimally-invasive, there is relatively less cornea weakening as the resulting cornea bed will be thicker. Cornea strength is better preserved, as compared to LASIK, which wastes cornea tissue to create a flap. Thus, the feared medical complications of keratectasia (a condition of progressive thinning of the cornea with time) is better kept at bay.
In TransPRK, about 55 um of surface epithelial cells are removed by the laser followed by cornea stroma tissue sculpting to correct the eye power. These surface epithelial cells will grow back fully after 5 days.
In LASIK, a cornea flap is first cut. This flap can be anywhere from 110 to 160 μm thick i.e. up to 30% of the cornea thickness. Cornea stroma tissue sculpting then takes place. Once cut, the cornea flap never fully heals.
3. All-Laser, No-Touch
TransPRK is an all-laser procedure performed using a single excimer laser (Schwind Amaris 1050RS). There are no surgical devices applied onto the eyeball, unlike the suction ring clamps used in LASIK & ReLEx SMILE. Thus, there is no fear of a major surgical complication from loss of suction ring clamp pressure.
4. One-Step Procedure – Simple & Fast
TransPRK requires the shortest treatment time among the different laser vision correction procedure, requiring only about 3 to 5 minutes per eye from start to finish. The actual laser sculpting time is from 10
to 50 seconds per eye only, depending on the eye power to be corrected. This greatly enhances the patients’ comfort and reduces the fear of
Actual laser sculpting time:
10 to 50 secs per eye
Total procedure time:
3 to 5 mins per eye
Orbscan & Sirius are two high-tech instruments used by eye doctors to measure wavefront errors and map out the topographical features of the cornea.
5. Allow True Customised & Wavefront Correction
Advancements in Laser Vision Correction (LVC) now allow customized correction of wavefront and topographical refractive errors. Advanced Surface Ablation (ASA) procedures such as TransPRK can perform true corrections, unlike LASIK where new wavefront and topographical errors are introduced from the cut cornea flap. ReLEx SMILE is unable to perform customized wavefront or topographical corrections.
6. Reduced Risk Of Permanent Dry Eyes
Cornea flap based surgery, in particular LASIK, is associated with dry eye that can be prolonged and permanent in some cases. As no cutting of cornea
nerve endings take place in TransPRK, there will be reduced complaint of dry eyes.
7. Suitable for More Eyes
There is hope yet for those who have been rejected from LASIK or ReLEx SMILE because of dry eye, high myopia and/or thin cornea problems! As laser sculpting begins right at the surface in TransPRK, candidates who have been previously rejected can now have hope.
8. Suitable For The Active Sports
Person Or Military Personnels
With TransPRK, there is no longer the need to fear dislodgement injury when participating in active sports or military duties because there is no cut cornea flap to worry about. Go about your rugged sports, be it rugby or boxing with absolute freedom!
9. Prepare For The Future
With TransPRK, less cornea tissue is wasted because there is no cut flap. The precious cornea tissue saved can useful to allow for future procedures, e.g. secondary enhancements and presbyopia
correction as our eyes age.
10. Longest Track Record (Since 1992)
Advanced Surface Ablation (ASA) has come a long way since the days of early PRK in 1992. TransPRK is the surface laser vision correction for the new generation. With advances in laser technology, intra-operative and post-op care medications and avoidance of sunlight exposure in the early post-operative care period; excellent results are now achievable with ASA.