Omega-3 fatty acids are often discussed for their ability to decrease inflammation. They contain certain components that may deliver a variety of health benefits. (Learn More – What Are Omega-3 Fatty Acids?)

While you usually hear about these acids in regard to heart health, there is some evidence to show that they may promote eye health in children. Other research looks at the potential advantages for age-related eye issues. (Learn More – Omega-3 Fatty Acids & the Eyes)

The best way to get this nutrient is from diet. You can then get a more diverse panel of nutrients that may work with omega-3 fatty acids to bring greater eye health benefits. (Learn More – What Foods Are High in This Nutrient?)

Another option is to take them in supplement form. It’s imperative that the supplement has the right dose and is high in quality. (Learn More – Taking an Omega-3 Fatty Acid Supplement)

What Are Omega-3 Fatty Acids?

salmonOmega-3 fatty acids are a type of nutrient. These are fats the body does not produce naturally, so people have to acquire them via their diet. In the last 30 to 40 years, scientists have discovered numerous potential benefits associated with these healthy fats.

Cell membranes throughout the body use these fatty acids, and they are integral to their proper formation. They also play an important role in the membrane’s cell receptor function.

Omega-3 fatty acids are in the polyunsaturated fat family. The three primary ones include:

  • Alpha-linolenic acid (ALA), which is generally used for energy.
  • Docosahexaenoic acid (DHA), which is the body’s most important omega-3 fatty acid. It is a major structural component of various body parts.
  • Eicosapentaenoic acid (EPA), which is partially converted into DHA. It also has other roles in the body.

Omega-3 Fatty Acids & the Eyes

This nutrient may contribute to better eye health. DHA is especially helpful since there are high levels of it present in the retina of the eye.

Several studies have looked at how this nutrient may impact vision development in infants. Analysis of multiple studies concluded that preterm infants who were provided formula that was supplemented with DHA had far greater visual acuity when they were 2 to 4 months old. These results were compared to preterm infants who did not receive an omega-3 supplement with their formula.

Other research looked at the potential benefits of this nutrient for dry eyes. Some research suggests that a supplement of omega-3 fatty acids could reduce symptoms of this condition. It may help to alleviate dry eye symptoms, such as stinging, burning, and itching.

Some research suggests that DHA can promote better eye health. One study stated that if someone is not getting enough of this omega-3 fatty acid, they have a higher risk of vision problems.

Other possible benefits of omega-3 fatty acids relate to macular degeneration. Getting enough of this nutrient may reduce a person’s risk of developing this eye condition.

Some studies in 2008 and 2009 looked at the role of omega-3s and macular degeneration. One showed that this nutrient appeared to reduce the risk of the development of wet macular degeneration. Another showed a 30 percent reduction in the risk of developing macular degeneration among people with the highest intake of this nutrient via their diet.

diagram of Macular Degeneration

What Foods Are High in This Nutrient?

Most people get adequate omega-3 fatty acids from their diet. The foods rich in this nutrient are diverse, so it is relatively easy to get enough via diet. The following foods contain high levels of omega-3 fatty acids:

  • Mackerel
  • Cod liver oil
  • Salmon
  • Oysters
  • Herring
  • Sardines
  • Caviar
  • Anchovies
  • Chia seeds
  • Flaxseeds
  • Walnuts
  • Soybeans
  • Algae and seaweed
  • Kidney beans

Incorporating these foods into your regular diet helps to ensure that you are getting enough of this nutrient. Ideally, aim to eat at least one of these foods every day.

Taking an Omega-3 Fatty Acid Supplement

fish oil

If you don’t get enough of these fatty acids from your diet, you might consider taking a supplement. It is important to talk to your doctor first to ensure that the supplement you choose is high in quality. Ideally, the supplement should contain all three types of omega-3 fatty acids.

In the United States, a lot of foods are fortified with these fatty acids, so the average person does not need to take a supplement. You shouldn’t take in more than 3 grams per day of omega-3s. Taking too much may cause uncomfortable symptoms that affect the gastrointestinal system.

The following are possible side effects of these supplements:

  • Fishy aftertaste
  • Indigestion
  • Loose stools
  • Bad breath
  • Nausea
  • Rash

People who take blood-thinning medications should avoid these supplements unless a doctor says it is okay to take them. Using omega-3 supplements with these types of medications carries an increased risk of bleeding. This was generally observed among people taking more than 3 grams of omega-3s per day.


Omega-3 Fatty Acids: An Essential Contribution. Harvard School of Public Health.

Fish Oil. (October 2017). Mayo Clinic.

What Are Omega-3 Fatty Acids? (December 2018). Academy of Nutrition and Dietetics.

Omega-3 Fatty Acids. (November 2018). National Institutes of Health.

Eye Benefits of Omega-3 Fatty Acids. All About Vision.

Fish Oil Supplements and Dry Eyes. (November 2017). Mayo Clinic.

The Role of Omega-3 Long-Chain Polyunsaturated Fatty Acids in Health and Disease of the Retina. Progress in Retinal and Eye Research.

Circulating Omega-3 Fatty Acids and Neovascular Age-Related Macular Degeneration. Investigative Ophthalmology and Visual Science.