Hi Seeing spots on and off is not a problem. But if persistent , it needs to be addressed. Since you say there is worsening of eye sight too, I would suggest you to undergo a detailed evaluation- that includes assessment of refractory errors, intra ocular pressure and an ophthalmoscopy. If all these things were done and normal- then you need not worry. Does she get headache too? Migraine may present with visual auras and usually runs in families. The lump behind her ears might be a lymph node which can get enlarged due to infections/ infestations in the scalp, external ear etc. Hope my answer helps you. Wish your daughter good health.