A Helmet Mounted Display (HMD) system, to be mounted on a helmet of a user, includes a tinted visor, coupled with the helmet, located in front of the face of the user when the tinted visor is in an operative position. The tinted visor further includes a patch, which is located in front of an eye of the user. The patch has greater light transmission than the rest of the tinted visor. The HMD system includes an image generator, coupled with the helmet, generating an image to be displayed to the user. The HMD system further includes an optical combiner, coupled with the helmet, and located substantially on the optical axis of the user's eye. The combiner reflects the generated image toward the eye, and transfers light rays of an outside scene toward the eye.