Hope my answer will help you in a way. As your doctor has prescribed you both steroid and restasis drops, plus with your chronic foreign body sensation, sounds like you have got some sort of ocular surface disease. It is difficult to just discuss about treatment at this point as I believe you doctor could have given you the best treatment. A little advise which could help is more towards your daily preventive measures, for eg don t stay in front of a direct blowing air, keep the environment moist, try to wear protective sunglasses when you are under the hot weather. Last but not least, LUBRICATION is the most important for your condition. ALOT of preservative free lubricants on top of restasis and steroid would definitely works like wonder.