Medically reviewed by Christine L. Larsen, MD Medications, trauma, and medical conditions can lead to abnormally small pupils ...

We move thanks to coordination among many skeletal muscle fibers, all twitching and pulling in sync. While some muscles align ...

MIT engineers have made a breakthrough in this area—they’ve developed a method to grow muscle tissue that contracts in ...

Typically, the pupil contracts and dilates depending on the amount of light entering the eye. Neurologists shine light into the eyes of trauma and stroke patients to gauge their light reflex 1 ...

Together, this complex architecture acts to constrict or dilate the pupil. Once Raman and her colleagues pressed the iris pattern into a hydrogel mat, they coated the mat with cells that they ...