Experimental research has targeted adhesion molecules known as selectins on epithelial cells. These molecules initiate the early capturing and margination of leukocytes from circulation. Selectin antagonists have been examined in preclinical studies, including cutaneous inflammation, allergy and ischemia-reperfusion injury. There are four classes of selectin blocking agents: (i) carbohydrate based inhibitors targeting all P-, E-, and L-selectins, (ii) antihuman selectin antibodies, (iii) a recombinant truncated form of PSGL-1 immunoglobulin fusion protein, and (iv) small-molecule inhibitors of selectins. Most selectin blockers have failed phase II/III clinical trials, or the studies were ceased due to their unfavorable pharmacokinetics or prohibitive cost.  Sphingolipids, present in yeast like Saccharomyces cerevisiae and plants, have also shown mitigative effects in animal models of gene knockout mice. 
For Seasonal Allergic Conjunctivitis "I started having red eyes. After the third day of not seeing any progress (I thought I had allergies). I went to the doctor for a diagnosis to find out I had "pink eye". He prescribed me Patanol to control the redness and told me to just wait as "pink eye" is a virus and will go away on its own. I decided to still buy the prescription to find out it cost $160 for 5ml tiny bottle! I used it twice a day (as prescribed) and my eyes were back to its normal white shade in couple of days. I never heard of this eye drop. It is really expensive but seems to be worthy."
Traveling from Eye to Nose
We'll take a moment here to review the exact pathway tears take to travel from eye to nose. Once tears have been secreted from the main and accessory lacrimal glands and distributed evenly over the ocular surface by the eyelids, they are then passed into the nose through the lacrimal drainage system beginning with the upper and lower puncta. Each of these drains into a canaliculus, which carries the tears through the ampulla, the short vertical section of this tube, until turning towards the nose in a horizontal direction. The canaliculi may then join into a common canaliculus or enter the lacrimal sac separately.
Perhaps the most amazing mechanism of this path is the movement of tears into the nose via an active lacrimal pump assisted by the action of surrounding muscle groups (pretarsal and preseptal orbicularis oculi). When the eye is open, the normal state of the puncta and canaliculi is also open but the lacrimal sac is empty or collapsed. When a blink occurs, the surrounding muscles contract in such a way that the canaliculi are "pinched" closed. Simultaneously the collapsed walls of the lacrimal sac are drawn away from each other so that the sac is opened, creating a negative pressure and pulling the tears trapped in the canaliculi toward it. Then, as the eye reopens, the walls of the lacrimal sac return to their collapsed state, pushing the tears that have collected there downward to the nasolacrimal duct, eventually draining through the inferior turbinate to the nose.
When the eye is open, the normal state of the puncta and canaliculi is open, but the lacrimal sac remains collapsed until the next blink.
These structures between eye and nose consist of connective tissue fibers in helical structural arrangements. Research has found that the lining of the nasolacrimal duct has a layered structure, similar to the tear film. 1 Laboratory study into the expression of mucins in the lacrimal sac and nasolacrimal ducts has revealed that the efferent tear ducts produce a range of mucin types, and researchers have identified mRNA for a variety of mucins in human lacrimal sacs and nasolacrimal ducts. The authors hypothesize that this spectrum of mucins may aid in the flow of tears and defense against microbes. 2