title: Excimer laser phototherapeutic keratectomy: indications, results and its role in the Indian scenario.
abstract: OBJECTIVE
  To report indications, technique, and results of excimer phototherapeutic keratectomy (PTK), and describe possible reasons for the small numbers of such procedures performed in a referral institute in India.
  
  
  METHODS
  Retrospective review of case records of 10 patients (11 eyes) who underwent excimer PTK at our institute between February 1994 and September 1997.
  
  
  RESULTS
  Corneal scars were the most common indication for treatment. Best-corrected visual acuity (BCVA) improved in 6 eyes (mean: 2 lines of Snellen acuity). All eyes had BCVA > or = 6/12 after treatment. None of the patients experienced loss of BCVA after treatment. Unaided visual acuity improved in 3 eyes and decreased in 2 eyes. Change in spherical equivalent refraction > or = 1 diopter occurred in 77.8% of eyes after treatment. Treating central corneal scars resulted in a significant hyperopic shift in refraction.
  
  
  CONCLUSIONS
  Excimer PTK is a safe and effective procedure for the treatment of superficial corneal opacities. Post-treatment ametropia may require further correction with optical aids. Inappropriate referrals, deep corneal scars, and cost of the procedure could have contributed to the small numbers of PTK performed at our institute. Improved understanding of procedural strengths and limitations could lead to increased use of this procedure, with satisfying results in selected patients.
authors.affiliation: Medical Research Foundation, Chennai, India. MDSAAA35@giasmd01.vsnl.net.in
authors.forename: S K
authors.initials: SK
authors.lastname: Rao
authors.forename: R
authors.initials: R
authors.lastname: Fogla
authors.forename: G
authors.initials: G
authors.lastname: Seethalakshmi
authors.forename: P
authors.initials: P
authors.lastname: Padmanabhan
mesh_terms: D000293:Adolescent; D000328:Adult; D002921:Cicatrix / Q000473:pathology / Q000601:surgery*; D003316:Corneal Diseases / Q000473:pathology / Q000601:surgery*; D003318:Corneal Opacity / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D007194:India; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D018903:Photorefractive Keratectomy; D011379:Prognosis; D012189:Retrospective Studies; D014792:Visual Acuity