The best replacement for sclera is sclerae.

The best alternatives to sclera are rated as following:
★★★★★  sclerae
★★★  conjunctiva
★★★  cornea
  sclera
  episclera

Your alternative for sclera is not listed? Suggest!
Speaking about sclera, one probably shouldn't forget about osteogenesis imperfecta.

Other search terms related to sclera and their ratings are:
★★★★★ osteogenesis imperfecta
★★★★ multiple fractures
★★ jaundice
You have in mind a companion for sclera and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sclera in all years. Click on graph for more.
sclera
sclerae
conjunctiva