Pupil dilation occurs when the opening in the center of your iris grows bigger to let in more light. Under normal circumstances, pupils can dilate to let in more light or in response to a variety of stimuli. The eye is a beautiful organ, and it is the only place in the human body where a doctor can see a part of the central nervous system, the optic nerve. The observation of that nerve is a crucial part of a comprehensive eye examination. Both the dilated and the undilated eye exams provide important information to an eye doctor. One of the first parts of a comprehensive eye exam is a test of your vision, and perhaps a measurement to determine an eyeglass prescription, both of which require that your eyes remain undilated.
Everything You Need to Know About Anal Dilators
Vaginal agenesis - Diagnosis and treatment - Mayo Clinic
Achalasia can be overlooked or misdiagnosed because it has symptoms similar to other digestive disorders. To test for achalasia, your doctor is likely to recommend:. Read more about esophageal manometry and upper endoscopy. Our caring team of Mayo Clinic experts can help you with your achalasia-related health concerns Start Here. Achalasia treatment focuses on relaxing or stretching open the lower esophageal sphincter so that food and liquid can move more easily through your digestive tract. Botox botulinum toxin type A. This muscle relaxant can be injected directly into the esophageal sphincter with an endoscopic needle.
What Is Anal Dilation & When Is It Medically Necessary?
We include products we think are useful for our readers. If you buy through links on this page, we may earn a small commission. We believe pleasure is a fundamental aspect of a safe and healthy sex life. Medically, dilators are used to help stretch the rectum to an ideal size to improve function and comfort after anorectal procedures.
Reflex anal dilation RAD is the reflexive dilation of the human anus to a diameter greater than two centimeters in response to the parting of the buttocks or anal stimulation, such as brushing with a medical instrument. RAD was theorized to be a clinical marker associated with anal sexual assault in children,  and has been associated with other signs of sexual assault  but also appears in children with severe chronic constipation and those subject to invasive medical treatments of the anus. It was discredited during the trial as the sole indication of sexual abuse, determined to be considered a sign of sexual assault by a tiny minority of British doctors. From Wikipedia, the free encyclopedia.