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Mydriasis is the dilation of the pupil, usually having a non-physiological cause, [3] or sometimes a physiological pupillary response. [4] Non-physiological causes of mydriasis include disease, trauma, or the use of certain types of drug.
Light entering the eye strikes three different photoreceptors in the retina: the familiar rods and cones used in image forming and the more newly discovered photosensitive ganglion cells. The ganglion cells give information about ambient light levels, and react sluggishly compared to the rods and cones.
Dilation and constriction of the pupil. Pupillary response is a physiological response that varies the size of the pupil, via the optic and oculomotor cranial nerve.. A constriction response (), [1] is the narrowing of the pupil, which may be caused by scleral buckles or drugs such as opiates/opioids or anti-hypertension medications.
Halloween shop in Derry, Northern Ireland, selling masks. Halloween costumes were traditionally modeled after figures such as vampires, ghosts, skeletons, scary looking witches, and devils. [66] Over time, the costume selection extended to include popular characters from fiction, celebrities, and generic archetypes such as ninjas and princesses.
A coloring book (British English: colouring-in book, colouring book, or colouring page) is a type of book containing line art to which people are intended to add color using crayons, colored pencils, marker pens, paint or other artistic media. Traditional coloring books and coloring pages are printed on paper or card.
After a summer full of grilled zucchini and yellow squash, now is the perfect time to switch things up and cook some winter squash. So what exactly sets summer and winter squash varieties apart?
“To say this is not unusual activity, it’s just wrong!” Christie exclaimed. “I’ve lived in New Jersey my whole life. This is the first time that I’ve noticed drones over my house.”
Anyone who’s seen December classics like “Home Alone” or “National Lampoon’s Christmas Vacation” knows that holiday decor can pack a punch: Tree baubles turn to glass-shard booby traps ...