No definitions found for 'of vital importance'
Perhaps one of these:
ophthalmia neonatorum,
ophthalmite,
ophthalmic region,
opodeldoc,
ovate leaf,
ophthalmoscopy,
ophthalmic vein,
ophthalmic,
off the wall,
ophthalmology,
opthalmic,
obitual,
ophthalmia,
ophthalmoscope,
ophthalmologist,
ovate-lanceolate,
ophthalmic artery,
ophthalmometer,
ophthalmy,
ophthalmectomy,
ophthalmological,
ophthalmoplegia,
opitulation,
ophthalmoscopic,
ophthalmitis,
ovoidal,
off-the-wall