title: Turnaround technique for intrastromal corneal ring implantation in eyes with false channel dissection.
abstract: We describe a turnaround technique for implantation of intrastromal corneal ring segments in eyes with femtosecond laser-assisted channel creation in which inappropriate surgeon maneuvering creates a false channel. The false channel causes difficulty in implantation as further forward maneuvering leads to enlargement of the false channel, finally precluding forward movement of the segment. This may result in suboptimal placement of the segment or abandoning the procedure. The situation can be overcome by removing the segment and turning it around so it is inserted in the opposite direction through the entry incision. It is then advanced using the second segment as an intrachannel instrument. The double-pass turnaround is used if asymmetric segments are planned and obstruction is encountered with the second segment. This technique was used successfully in 4 eyes with a false channel.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned. Additional disclosures are found in the footnotes.
authors.affiliation: Dr. Agarwal's Eye Hospital and Eye Research Centre, Chennai, India.
authors.forename: Soosan
authors.initials: S
authors.lastname: Jacob
authors.forename: Vidya
authors.initials: V
authors.lastname: Nair
authors.forename: Gaurav
authors.initials: G
authors.lastname: Prakash
authors.forename: Dhivya
authors.initials: D
authors.lastname: Ashok Kumar
authors.forename: Athiya
authors.initials: A
authors.lastname: Agarwal
authors.forename: Amar
authors.initials: A
authors.lastname: Agarwal
mesh_terms: D000328:Adult; D003319:Corneal Stroma / Q000601:surgery*; D019781:Corneal Topography; D005260:Female; D006801:Humans; D007223:Infant; D007640:Keratoconus / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D013508:Ophthalmologic Surgical Procedures; D019904:Polymethyl Methacrylate; D019736:Prostheses and Implants; D019919:Prosthesis Implantation / Q000379:methods*; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult
chemical_list: D019904:Polymethyl Methacrylate