An infectious disease caused contractive activity of muscles that contract and dilate eye pupil (paralytic state). What functional eye system was damaged?

14-year-old patient has twilight vision impairment. What vitamin deficiency takes place in the organism?

During the examination the doctor found that the patient does not distinguish blue and green colors with normal perception of other colors. What structure is disordered?

An eyeball structure without blood vessels was detected in a histological specimen. What structure is characterized by this morphological sign?

A lot of people with age have clouding of the lens (phacoscotasmus or cataract). It became opaque that leading to the partial blindness. What optical and chemical properties of the lens fibers protein will be disordered?

A patient had taken high doses of streptomycin and consequently became deaf. The function of what cells of the inner ear was damaged in this case?

In an electronic micrograph of a sense organ hair cells are seen, on their apical part there are short microvilli – stereocilii and a polar located kinocilium. What sensory organ are such cells typical for?

A cell of the retina in which one of the processes has a segment with hemidiscs is visible in the electron microscope picture. What pigment is contained in the structure of the membrane of these hemidiscs?

Patient with eye trauma consulted a doctor. During examination of corneal epithelium was revealed changes. What epithelium was damaged?