Patent ID: 7891806

Claim:
Single-lens eyeglasses having a single lens or twin-lens eyeglasses having two lenses, wherein parameter (h) is 20 mm or greater and a parameter ratio (l/h) is 6 or smaller, the parameters (h) and (l) being defined as follows: assuming that the eyeglasses are placed on a horizontal surface (A) with temples (T) open so that the eyeglasses are ready to fit on the face of the wearer, and portions C to which the left and right temples (T) are attached are present at both ends of a front portion (B) when the eyeglasses are viewed from above, the length of a straight line (L) connecting the two portions C is (l) mm, and the length of a normal (H) to the straight line (L) drawing from the forefront surface (E) of the front portion (B) located on the central line (D) of the eyeglasses is (h) mm, (K) is 3 degrees or greater, the parameter (K) being defined as follows: assuming that the eyeglasses are placed on the horizontal surface (A) with the temples (T) open so that the eyeglasses are ready to fit on the face of the wearer, and when the eyeglasses are viewed from the front, a lower portion of each of the left and right halves of the lens or each of the left and right lenses is in contact with the horizontal surface (A) at a single contact point (F) and a circle (G) having a radius of 10 mm around the contact point (F) intersects the lower portion of the lens at an intersection (I), the inclination angle between a straight line (J) connecting the contact point (F) and the intersection (I) and the horizontal surface (A) is (K), and at least the inner surface of the lens or each of the lenses has a water-repellent film or an anti-fogging film.