There are two types of photoreceptors in the human retina, rods and cones. Rods are responsible for vision at low light levels (scotopic vision). ... Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity.
you could use refusual strategies such as assertivley denying or giving another solution or excuse like "oh why don't we do something else that donesn't sound very much fun to me.
