The pressure decreases because there is less density meaning there are less atoms or molecules in a space. Gravity determines the density by pulling in more molecules towards â¦ the center of the Earth.
Therefore, about 85-90 percent of children with hereditary retinoblastoma develop multiple tumors that affect both eyes (bilateral disease). The remaining 10-15 percent of patients with hereditary retinoblastoma develop only a single eye tumor (unilateral disease).
Babies are usually born with blue/blue-gray or brown eyes. If both parents are light-skinned Caucasians, blue or blue-gray may be the eye color you will first see. If you both have dark skin and brown eyes, your little one will probably have brown eyes at birth, but not necessarily. It depends on the genes for eye color that you passed down to them. { MORE:Top 10 Tips for Choosing a Pediatrician for Your Child } Eye color is inherited. It used to be thought that it was a simple inheritance pattern, and often it is. Brown eyes are dominant over blue eyes. Research has revealed that there may be more than two genes involved in eye color as it was previously believed. If you have brown eyes, you might have multiple brown-eye genes, or some brown and some blue.