Letters that make diopter
o, d, e, p, r, t, i are letters that make 'diopter'
diopters is a word created by adding a letter to 'diopter'
1 possible definitions for 'diopter'
Under this definition, diopter is a noun and has the following properties:
dioptre has the same meaning as diopter
'diopter' can be a type of unit of measurement, unit.