Thelansis

  Mydriasis and pupil dilation can result from various causes, including non-physiological factors like disease, trauma, drug use, or as part of the normal pupillary response. An agent called a mydriatic is commonly used to induce pupil dilation, primarily for facilitating retina examinations and other deep eye structures. In general medical practice, the most common reason for pupil dilation is screening for diabetic retinopathy, followed by macular degeneration. This condition can also occur as a symptom of brain injury resulting from physical trauma or stroke, affecting one pupil individually or both simultaneously. The process of pupillary dilation is governed by the iris dilator muscle, composed of radially oriented fibers that connect the iris's exterior to its interior. When the dilator muscle contracts, it pulls the iris's interior outward, enlarging the pupil's size. Additionally, the iris dilator muscle is under the control of the sympathetic nervous system, whi...

 Mydriasis and pupil dilation can result from various causes, including non-physiological factors like disease, trauma, drug use, or as part of the normal pupillary response. An agent called a mydriatic is commonly used to induce pupil dilation, primarily for facilitating retina examinations and other deep eye structures. In general medical practice, the most common reason for pupil dilation is screening for diabetic retinopathy, followed by macular degeneration. This condition can also occur as a symptom of brain injury resulting from physical trauma or stroke, affecting one pupil individually or both simultaneously. The process of pupillary dilation is governed by the iris dilator muscle, composed of radially oriented fibers that connect the iris's exterior to its interior. When the dilator muscle contracts, it pulls the iris's interior outward, enlarging the pupil's size. Additionally, the iris dilator muscle is under the control of the sympathetic nervous system, which ...