I have a swollen/puffy eye what can I do to cure it I can't even see?

INFECTION or ALLERGY. A swollen eye is concerning for an infection so i would recommend getting seen right away. A particularly concerning infection is called 'peri-orbital cellulitis' which may need I.V. Antibiotics. A swollen eye may also be an allergic response so antihistamines may help (e.g. Benadryl/zyrtec/allegra).
Huh? You can't see out of the eye that is shut closed? Use cold compresses and keep your head up- if no better tomorrow, see ophthalmologist.