Patent ID: 7117547
Filing Date: 2006-10-10
Classification: G02C

Abstract:
1. Goggles on which a frame including lenses for correcting visual acuity can be attachably and detachably mounted, the goggles comprising a lens system that includes a pair of facing surfaces which face a front of a user's face and a pair of side curving surfaces which are positioned adjacent to the sides of the user's face, said lens system comprising: a first radius of curvature of said pair of facing surfaces, said first radius of curvature extending in a horizontal direction when the user wears said goggles in a usual posture; a second radius of curvature of said pair of side curving surfaces, said second radius of curvature extending in the horizontal direction; and a third radius of curvature of said pair of facing surfaces, said third radius of curvature extending in a vertical direction when the user wears said goggles in a usual posture, said first radius of curvature, said second radius of curvature, and said third radius of curvature being different from each other, wherein said first radius of curvature is greater than or equal to approximately 200 millimeters, said second radius of curvature is between approximately 15 millimeters and 30 millimeters, and said third radius of curvature is between approximately 50 and 100 millimeters, and wherein said first radius of curvature is set such that said pair of facing surfaces are approximately parallel to the front of the user's face, and said second radius of curvature and said third radius of curvature are set such that light can be prevented from directly entering the eyes of said user and foreign substances can be prevented from entering the user's eyes.