Binoculars; Headphones; Field-glasses; Magnifying glasses; Magnifying glasses that fit on the user's face in the manner of eyeglasses; Magnifying lenses; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical condensers; Optical glasses; Optical lamps; Optical lenses; Smartphone screen magnifiers