"Overall, 61 percent of people in the omega-3 group and 54 percent of those in the control group achieved at least a 10-point improvement in their symptom score, but the difference between the groups was not statistically significant."

That's enough to convince me to take the fish oil supplements. If these good results weren't statistically significant, then the sample size may be too small or the significance level might be too high given the confounding factors.

Fish oil had no reported negative effects, they are cheap, and they have cardivascular and brain benefits aside from the possible benefits shown in the study.

This study is just noise. People should eat fish, because people always ate fish. Our bodies are adapted to what they have done over hundreds of thousands of years. There are probably 100,000 aspects to health. How are we going to tease out the perfect diet when we have 100,000 processes to optimize. The best we can do is go with traditional diets and activities. Eat fruit, mushrooms, vegetables, nuts, legumes, mammals, birds, and fish and other traditional meats. Use traditional spices.

One might wonder which fatty acids are different then, between fish oil or plant oils like soya or flax .. ?

"SOYA lecithin, an ingredient found in margarine, has been found to cure and prevent dry eye syndrome."
"Flaxseed Oil Supplements May Help Dry Eyes"

Must be that alpha-linolenic acid .. not found in fish .. but found in plants ..

"Schepens Eye Research Institute have found for the first time that topical drop application of alpha-linolenic acid (ALA) led to a significant decrease in clinical signs of dry eye syndrome (DES) in animal models. ALA is a fatty acid that cannot be made by the body and must be supplied in the diet. "

A curious thing, vegetarians are shown to have more alpha-linolenic acid in their spit, than meat eaters.

"A greater salivary concentration of alpha-linolenic acid (18:3 n-3) (2.82) was found in V than in M subjects"

"vegetarians are shown to have more alpha-linolenic acid in their spit, ..."

And less vitamin B-12 in their blood, unless they take supplements created in lab. :)

"Overall, 61 percent of people in the omega-3 group and 54 percent of those in the control group achieved at least a 10-point improvement in their symptom score, but the difference between the groups was not statistically significant."

That's enough to convince me to take the fish oil supplements. -Shakescene21

Oh, really? Perhaps you missed this important tidbit: "all participants were free to continue taking their previous medications for dry eye, such as artificial tears and prescription anti-inflammatory eye drops." If there's no statistical difference between the groups and general improvement in both, then the likely the other medications are the reason for the improvement.

"vegetarians are shown to have more alpha-linolenic acid in their spit, ..."

And less vitamin B-12 in their blood, unless they take supplements created in lab. :)

That is a fallacy. Vegetarians are no more lacking in B-12 than their meat eating counterparts.Their vegetarian/low iron diet allows for the proper bacteria in the gut to flourish, thereby fueling the bacteria which produces B-12.
"Lactobacillus reuteri may counteract side effects produced by vitamin B12 deficiency."
"Lactobacillus and Bifidbacterium are lactic acid bacteria, their growth is inhibited by the iron."

And since meat is considered to be 'high iron', therefore incompatible to humans, evidenced by the pathogenic microbiome, the natural vegetarian diet would have plenty of B-12 and alpha-linolenic to cure the dry eye.