Photorefractive Keratectomy For Keratoconus Treatment
Published 2023 - 41st Congress of the ESCRS
Reference: PO0686 | Type: Free paper | DOI: 10.82333/cqfs-md86
Authors: Lamari Hasnaa* 1 , Abdelfattah Benkirane 2
1Ophthalmology,clinique al bassar,mohammedia,Morocco, 2Ophthalmology,Ophtalmoclinique Casablanca,Casablanca,Morocco
Purpose
To report our results about PRK associated with cross linking in the "refractive treatment" of keratoconus.
Setting
Keratoconus affects the young patients and poses the problem of visual rehabilitation. PRK associated to cross linking is part of the therapeutic arsenal of this pathology.
Methods
We operate 12 patients (18 eyes). Our patients were between 25 to 35 years old
The keratoconus was infraclinic or stage 1, stable and pachymétrie ≥ 450µ
The treatment included
* Topoguided trans PRK with a maximum ablation of 60µ
* Cross Linking in the same time (10 mn of riboflavine instillation and 10 mn UV exposition)
Results
Follow up between 6 months and 5 years :
* No complications
* Visual acuity without optical correction between 5/10 and 8/10
* Post operative pachymetry : mean 398µ (340 to 400µ)
Complications : 2 cas of haze without loss of visual acuity
Conclusions
PRK in keratoconus is based on corneal topography. It's correct spherocylindrical refractive errors and normalize the corneal profile
by smoothing the corneal surface. The purpose of this treatment is 70% correction of refraction
With maximum stromal ablation from 50 to 80μ and minimum posterior wall from 350 to 400μ.
Cross linking may be conventional or accelerated, in a single operating time or sometimes before PRK in 2 operating steps with
identical end result. Many protocoles are reported : crete, athene ....
It seems a safe and effective method for "Refractive" treatment of keratoconus
It can be combined with other surgery (intracorneal rings, ICL)
The long-term evolution is unknown(Very slow stromal collagen turnover)