Chapter 6 Special Sensory Organs: Eye and Ear 273 Chapter Review Word Elements Summary Prefi xes Prefi x Meaning an- not without extra- outside hemi- half intra- inside within para- near beside peri- around Combining Forms Root Word/Combining Vowel Meaning audi/o hearing blephar/o eyelid ir/o iris irid/o iris kerat/o cornea myc/o fungus myring/o tympanic membrane eardrum ocul/o eye ophthalm/o eye opt/o eye vision optic/o eye vision ot/o ear pleg/o paralysis presby/o old age retin/o retina scler/o sclera (white of the eye) tympan/o tympanic membrane eardrum