Do not use tadalafil with any of the following: certain drugs used to treat chest pain/angina (nitrates such as nitroglycerin, isosorbide), recreational drugs called poppers containing amyl or butyl nitrite.
IT will require two parts to answer your question as it's phrased. The camera's shutter controls the time that light falls on the film, so controls the duration of exposure, a â¦ nd the lens aperture controls the brightness of the light falling on the film. The two functions are used together to get the desired effect.
Iris and Pupil. The colored part of the eye is the iris. It is a muscle that controls the pupil, the opening in the middle of the eye that controls the amount of light coming in. Lens and Retina. The lens is behind the pupil and focuses light onto the retina, the light-sensitive cells on the back of the eyeball.