avoid using vaseline that r not meant for eyes..u may use artificial tears/genteal eye drops and
ointments at bedtime..at the same time get yr eyes checked for the proper diagnosis..at yr age many other things may be there coincidently because of old age..its always better to rule out....get yr glasses checked atleast once in a year..throid profile test is also needed from time to time..for its levels..
keep in touch..u will be fine soon..wish u all the best..