There are multiple definitions:

1. intersegmental vessel(English)

   • DLAV
   • Vessel properties

2. index of surface variance(English)

   • a corneal topometric index
   • CDVA, CKI, CXL, ICL, ICRS, IHA, IHD, LASIK, UDVA
   • Ophthalmology
   • https://doi.org…97X-20191217-01