Ã Basal body- anchors the flagellum to the cell wall and plasma membrane. Ã Hook- anchors the flagellum to the cell wall. Ã Filament- outermost region on the flagellum, composed of the protein flagellin. Ã *flagellum is made by flagelly :)
Keratoconus does not make people go blind. However the changes to the cornea can make it impossible for the eye to focus without eyeglasess or contact lenses. Keratoconus can be dangerous if laser vision correction surgery (LASIK or PRK) is performed on the eye.
Eventually, clumping pigment and punched out areas of pigment loss called geographic atrophy are seen. These areas can cause blind spots in vision. These areas of atrophy progress slowly over years but can result in severe central vision loss. Currently there is no specific treatment for dry macular degeneration.