what type of nerve damage in your daughter's eye? my son (14) last spring while taking singulair was diagnosed with bilateral papal edema ie: swollen optic nerves. The first symtoms were severe headaches which was diagnosed eventually as intercranial hypertension. the side effects of this were the swollen optic nerves. we ran every test imaginable and were never given a firm diagnosis of why any of this occured. he is totally back to normal now and i took him off the singulair. he also was experiencing tingling in his extremities. i also had him tested the year before for add which was negative. his school work and work ethic this school year is remarkably different that the previous years while taking singulair for his seasonal allergies.