- x linked inheritance
- x ray lenses
- xanthelasma
- xanthelasmatosis
- xanthene
- xanthene dyes
- xanthine crystalline deposits
- xanthine oxidase
- xanthinuria
- xanthochromia
- xanthochromic mean
- xanthogranuloma
- xanthomatous
- xanthopsia
- x-axis in ophthalmic measurements
- x-axis rotation
- x-bridge frame
- x-curve lens design
- x-cut (ophthalmic surgery)
- xenodochal mean
- xenodochium
- xenoestrogens
- xenogenic corneal graft
- xenoglass
- xenograft eye
- xenon
- xenon arc lamp
- xenon arc testing
- xenon gas
- xenon light
- xenon photocoagulation
- xenophthalmia
- xenotropia
- xeroderma
- xeroderma pigmentosum
- xerophagy
- xerophthalmia
- xerosis
- xerosis conjunctivae
- xerostomia
- xerotic
- xerotic blepharitis
- xerotic keratitis
- x-flex nose pad
- x-linked achromatopsia
- x-linked cataract
- x-linked corneal dystrophy
- x-linked nystagmus
- x-linked ocular albinism
- x-linked ocular motor apraxia
- x-linked optic atrophy
- x-linked retinal dystrophy
- x-linked retinitis pigmentosa
- x-pattern strabismus
- x-ray absorber
- x-ray diffraction
- x-ray ophthalmoscopy
- x-ray shield
- x-ray vision
- x-rimless frame
- x-titanium alloy frame
- x-y stage (microscope)
- x-y translator
- xylocaine (lidocaine)
- xylulose reductase