Convert to ICD-10-CM: 
371.71 converts approximately to:
- 2015/16 ICD-10-CM H18.719 Corneal ectasia, unspecified eye
 ICD-9-CM Volume 2 Index entries containing back-references to 
371.71:
- Ectasia, ectasis cornea (marginal) (postinfectional) 371.71 cornea (marginal) (postinfectional) 371.71
  scar, cornea 371.71 scar, cornea 371.71
 
- Keratectasia 371.71