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).
1 Tay-Sachs disease (TSD): This condition progressively destroys the brain and nervous system, leading to blindness, paralysis and death. 2  Symptoms of the most common type of TSD usually form when the baby is six months old, and patients typically die within a few years.