An eye disease, usually chronic and slow, with increased pressure of fluid within the eye causing degrees of impairment to the optic nerve, and slowing circulation between the eye chambers sufficient to also contribute to lens deposits and corneal opacities. When under adrenalin stress or under the effect of most stimulants, pupils dilate, the eyeball changes shape, and pressure within the eye increases. This may not itself start glaucoma, but adrenergic stress will surely make it worse.