di·op·tom·e·ter 
(dī′ŏp-tŏmĭ-tər)
(dī′ŏp-tŏmĭ-tər)n.
An instrument that is used for measuring ocular refraction.
[DI(A)- + OPT(IC) + -METER.]
di′op·tome·try n.
- paraphrastically
- paraphyletic
- paraphyletically
- paraphyly
- paraphysis
- paraplegia
- paraplegic
- parapodium
- parapraxis
- paraprofessional
- parapsychic
- parapsychological
- parapsychologist
- parapsychology
- paraquat
- parasail
- parasailer
- parasang
- paraselene
- paraselenic
- parasexual
- parasexuality
- parasexually
- parasite
- parasitic