Abstract: A removable head for an ophthalmic slit lamp assembly that replaces the conventional slit lamp microscope with a laser and binocular microscope combination. The optic axis of the laser is aligned to the optic axis of the binocular microscope so the optical head can be removed and used with another slit lamp assembly. An adaptor provides adjustable connection between the optical head and a microscope support arm of the slit lamp assembly. The adaptor consists of a base member and a frame member. The frame member is rotated and translated relative to the base member to align the optic axis of the optical head to the slit lamp optic axis.

Abstract: A club aiming unit for attachment to a club providing a means for enabling the orientation of the impact surface of a club head with respect to the target to be monitored during the swinging of a club. In particular, the invention is particularly useful in relation to croquet mallets or golf putters. The club aiming unit comprises a first light source producing a first planar beam of light having a narrow and substantially linear cross-section that projects a line of light onto a surface, and attachment means for mounting the first said light source to said club such that said first beam is projected over the preferred impact point of said impact surface with the plane of said first beam perpendicular to said impact surface, causing a line of light to be projected onto any surface immediately below the said club head.