For these two reasons, we believe the patients episodes of spontaneous, non gaze-evoked mydriasis with distortion is best described as tadpole pupil phenomenon. The iris is a light-transmitting diaphragm that controls the amount of light entering the pupil inside the eye.1 Iris is also responsible for maintaining the size and diameter of the pupil. Patients with multiple vertical linear abrasions should have their eyelids everted to search for a foreign body under the upper lid. Also, Tournay phenomenon does not typically cause such distortion of pupillary shape. Occasionally, this occurs after intraocular surgery such as cataract removal and corneal transplant and even following retinal. Usually this is blunt closed trauma which damages the iris sphincter muscle which constricts the pupil or one of the pathways in the brain which controls it. A positive Seidel sign indicates leakage of aqueous fluid through a corneal perforation. Trauma to the brain or eye can cause a fixed pupil. Seidel sign is streaming of fluorescein away from a corneal laceration, visible during slit-lamp examination Slit-lamp examination The eye can be examined with routine equipment, including a standard ophthalmoscope thorough examination requires special equipment and evaluation by an ophthalmologist. read more with cobalt light illumination renders abrasions and nonmetallic foreign bodies more apparent. Based on various proposed pathophysiologic mechanism of tadpole pupil, we can consider potential forms of treatment. Fluorescein staining Corneal examination The eye can be examined with routine equipment, including a standard ophthalmoscope thorough examination requires special equipment and evaluation by an ophthalmologist. Essentially, the term coloboma is used to describe the condition where a portion of tissue is completely missing from the eye or eyelid. After an anesthetic (eg, 1 to 2 drops of proparacaine 0.5%) is instilled into the inferior fornix, each lid is everted, and the entire conjunctiva and cornea are inspected with a binocular lens (loupe) or a slit lamp.

Teardrop pupil causes