Abstract: A spectacle-type frame has a pair of open frame portions with a first alignment bar mounted across them by means of which a golfer wearing the frame lines up the direction of travel of a golf ball between an adjacent point and a distant point. A pair of second alignment bars extend at right angles to the first alignment bar at the respective open frame portions. These second alignment bars form a single focus line with the golfer's eyes and the golfer lines up the face surface of a golf club with such focus line for causing a golf ball when struck to travel accurately along the line determined by the first bar. The first alignment bar is adjustable for positioning it in proper alignment with the golfer's eyes and the second alignment bars are adjustable to provide the common focus line with the golfer's eyes.

Abstract: A selective optical filter, intended to be placed before the eyes for protection and for improvement of vision, features a plurality of different light absorption zones comprising a central zone which is completely light permeable, or has low light absorption capability, a zone surrounding this central zone which is light permeable but has a relatively high light absorption capability, the said zone being included between the periphery of the central zone and a cone having its apex at the optical center of the eye and an included angle of between about 15.degree. and 30.degree., and the outer periphery of the zone adjoining a further zone of low light absorption capability corresponding to the peripheral part of the retina.

Abstract: Homonymous-hemianopsia corrective device, comprising first and second reflectors, provides corrected vision over an overall field of view which is greater than the limited angular field of view of uncorrected vision of a person suffering from homonymous hemianopsia.

Abstract: A see-through zone is provided of a shape and size so that the horizontal end portions of the zone will merge as an image defining a target frame into which the user can center a stationary or moving target by keeping his line of sight properly on the target.

Abstract: Eyeglasses used to provide depth simulation when worn to view a planar picture on a movie screen. The temples and frame of the eyeglasses are made from substantially rectangular opaque plastic and transparent, triangular shaped lenses are positioned in the frame adjacent a nosepiece cut therein. The lens and frame arrangement allow each eye to view the screen except for the corresponding edge thereof so that when the total picture is seen through both eyes the sensation of depth perception is realized.

Abstract: Spectacle frame with plano or prescription lenses, or having no lenses, is provided with screen or shield structure only for the eye farthest from the lane of approaching traffic to protect against dazzle from the lights of approaching vehicles. In the United States, where "right hand driving" is the traffic rule, such protection is only for the right eye. The screen shields the inner or nasal half of the protected eye, the full height of the lens rim. At the protected eye, the frame may also have a screen across the minor upper part of the lens rim. The screens may be opaque, or a filter, neutral or colored, having a density of 0.5 to 1.5, which is found practical. The screens may be of sheet material, releasably movably mounted, so their positions are adjustable. This invention utilizes better and more effectively the characteristics of eye behavior, that protection of only one eye, with maintainance of vision, will protect a nocturnal driver from dazzle and discomfort.

Abstract: Automatically operable protective means, e.g. a helmet, for use by welders, has an eye shading means which is brought automatically into shading condition upon reception of light rays or ultrasonic vibrations by a transducer and electromagnetic operator. Provision is made for supplying cooling air to the electronic and electromagnetic devices and to the eye shade, and the shade may incorporate movable polarizing plates for adjustment of transparency.