A head-mounted display (HMD) comprising: a front rigid body ; a head strap or eyeglasses temples and temple tips; an eye cone configured to display images to one of a user's eyes, the eye cone comprising an optical lens and a peripheral wall extending towards the rear of the HMD ; and a lens assembly comprising: a corrective lens configured to correct a vision error of an eye, the corrective lens comprising: a first surface , a second surface opposing the first surface , and a side surface connecting the first surface and the second surface ; and a frame configured to attach to the body of the HMD , the frame comprising: an inner surface onto which the corrective lens is attached, and a wall extending at a first portion of the frame and configured to receive the peripheral wall at the eye cone of the HMD , an inner surface of the wall comprising a plurality of protrusions configured to be received in a plurality of notches on an outer surface of the peripheral wall of the eye cone ; wherein the lens assembly is removably attached to the peripheral wall of the eye cone . a front rigid body ; a head strap or eyeglasses temples and temple tips; an eye cone configured to display images to one of a user's eyes, the eye cone comprising an optical lens and a peripheral wall extending towards the rear of the HMD ; and a lens assembly comprising: a corrective lens configured to correct a vision error of an eye, the corrective lens comprising: a first surface , a second surface opposing the first surface , and a side surface connecting the first surface and the second surface ; and a frame configured to attach to the body of the HMD , the frame comprising: an inner surface onto which the corrective lens is attached, and a wall extending at a first portion of the frame and configured to receive the peripheral wall at the eye cone of the HMD , an inner surface of the wall comprising a plurality of protrusions configured to be received in a plurality of notches on an outer surface of the peripheral wall of the eye cone ; wherein the lens assembly is removably attached to the peripheral wall of the eye cone . a first surface , a second surface opposing the first surface , and a side surface connecting the first surface and the second surface ; and a frame configured to attach to the body of the HMD , the frame comprising: an inner surface onto which the corrective lens is attached, and a wall extending at a first portion of the frame and configured to receive the peripheral wall at the eye cone of the HMD , an inner surface of the wall comprising a plurality of protrusions configured to be received in a plurality of notches on an outer surface of the peripheral wall of the eye cone ; wherein the lens assembly is removably attached to the peripheral wall of the eye cone . an inner surface onto which the corrective lens is attached, and a wall extending at a first portion of the frame and configured to receive the peripheral wall at the eye cone of the HMD , an inner surface of the wall comprising a plurality of protrusions configured to be received in a plurality of notches on an outer surface of the peripheral wall of the eye cone ; wherein the lens assembly is removably attached to the peripheral wall of the eye cone . <EOS>