What are Optrex Bloodshot Eye Drops? Optrex Bloodshot Eye Drops re medicated to relieve redness of the eyes. Its formulation temporarily relieves the redness of the eyes caused by minor irritation. Dusty smoky atmospheres, eye strain and chlorine in swimming pools can make the eyes red and bloodshot. How to use Optrex Bloodshot Eye Drops For temporary relief of redness of the eye due to minor eye irritations. Adults, children over 12 years and the elderly: Gently squeeze one to two drops into the corner of each eye. No more than 4 times daily. Optrex Bloodshot Eye Drops contain the active ingredients Naphazoline and Hamamelis Virginiana. These are present as Naphazoline Hydrochloride PhEur O. ol% w/v and Distilled Witch Hazel BPC 12.5%v/v.