Best Retinoscopes: Review and Buying Guide

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Retina transmits light down the optical nerve so you can see clearly in both bright and dim lighting conditions. The main function of the retina is to transform the rays of light (which strike the eye) into electrical impulses that travel through the optic nerve to your brain. This process allows you to see clearly … Read more

Lungfish: The Oldest Living Animal On Earth

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The lungfish is the oldest living animal on earth. It lives in muddy waters in Africa, South America, and Australia. What seems most surprising about these creatures is that they can survive without breathing air. They have developed the ability to respire through their skin, mouth, and gills. These fish can live without oxygen for … Read more

Bone sclerosis: Causes, Symptoms, and Treatment

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Bone is a living tissue that responds to healthy or unhealthy conditions by becoming thicker or thinner. During childhood, bones are actively being built up, which slows down during the teen years. Bones are also being broken down, especially after age 20 due to wear and tear and weakening as we age. Bone tissue is … Read more

Disinfection and Sterilization

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Disinfection and sterilization are two terms that are often confused by people because on the surface they would appear to mean the same thing. However, there is a very clear difference between disinfection and sterilization. Properly disinfecting a surface means that it has been thoroughly cleaned of visible dirt, removing any remaining bacteria with a … Read more