U can consult Ayurveda opthalmologist who will surely help you for this condition with suitable external procedures like akshitarpana ( nourishing procedure to eyes) and internal medicines which helps in managing the inflammatory conditions so on.

Yes Mahatriphala ghrutam helps a lot and you will forget that you even have dry eyes. But before that we should kniw that what causes dry eyes: Sometimes, there's a lack of balance in your tear-flow system. Or your air conditioner, heater, or other things around you could dry out your tear film. Other causes include: The natural aging process. Side effects of certain drugs like antihistamines. Diseases that affect your ability to make tears, like Sjogren's syndrome, rheumatoid arthritis, and collagen vascular diseases. Problems that don’t allow your eyelids to close the way they should.

Yess, Triphala Ghrut is advisable in various diseases of eye, even including cataract. And for dryness you can simply apply some castor oil before  you retire to bed. However, It would be convenient if you could provide more information or share reports. If the Intraocular pressure (IOP) is raised, then 'Raktamokshan Karma' by Jalaukavacharan can give  quick results. Consult with Ayurveda Physician near you.