7.2 PRESS-ON PRISM For 7.2 PRESS-ON PRISM For the treatment of strabismus PRESS-ON PRISM: Used to treat several ocular motility disorders including strabismus. AEK Advantage of Press-On: practical, lightweight, wide power range. Thin and flexible and easy to fix to existing lenses - held by static adhesion, easily removed. Low cost and low risk treatment during power changes and vision therapy . PRISM POWERS IN DIOPTRES - Prism Ref. Power Ref. Power 67 mm - 1 pc. Ref. Power 08101 1 ∆ 08102 2 ∆ 08103 3 ∆ 08104 4 ∆ 08107 7 ∆ 08108 8 ∆ 08109 9 ∆ 08110 10 ∆ 08116 20 ∆ 08117 25 ∆ 08118 30 ∆ 08119 35 ∆ Prism 1 ∆ 08105 5 ∆ 08106 6 ∆ 08112 12 ∆ 08115 15 ∆ 08120 40 ∆ The pictures show how the image is moved by the prism to accommodate the different direction of the patient’s line of sight. The image is moved in the opposite direction to the base. AEK HOW TO APPLY PRESS-ON PRISMS • There is no need to determine the optical centre of the lens. • The glossy side of the Press-On is applied to the inside of the lens. Prism 10 ∆ AEK 1. Place the lens onto the Press-On with the inner side of the lens facing the smooth surface of the prism, according to the prescription. 2. Trace the shape of the lens onto the Press-On. 3. Cut the Press-On (1 mm less than the traced shape). 4. Moisten the inside of the lens and apply the Press-On prism with the glossy side facing the inside surface of the lens. Do not use any adhesives. CORRECT POSITIONING OF PRESS-ON PRISM ON LENS The base orientation of the prism is indicated with the word “base” on the prism edge. Mark lens and prism at the same position on their edges to indicate alignment. The Press-On must be positioned onto the lens according to the BASE description indicated in VIDEO the prescription: NASAL, TEMPORAL, TOP, BOTTOM, DIAGONAL. Prism 40 ∆ Press-On and 3M are a registered trade mark of 3M MD Medical device compliant with EU Regulation no. 2017/45 8 ALL RIGHTS RESERVED ©
PRESS-ON PRISM For the treatment of strabismus 7.2 Vertical Correction NASAL BASE The prism’s lines are vertical. Real position of the word ‘BASE’ on the Press-On: Right eye: nasal, at the bottom, text vertical. Left eye: nasal, at the top, text vertical. TEMPORAL BASE The prism’s lines are vertical. Real position of the word ‘BASE’ on the Press-On: Right eye: temporal, at the top, text vertical. Left eye: temporal, at the bottom, text vertical. Horizontal Correction TOP BASE The prism’s lines are horizontal. Real position of the word ‘BASE’ on the Press-On: Right eye: nasal, at the top, text horizontal. Left eye: temporal, at the top, text horizontal. BOTTOM BASE The prism’s lines are horizontal. Real position of the word ‘BASE’ on the Press-On: Right eye: temporal, at the bottom, text horizontal. Left eye: nasal, at the bottom, text horizontal. Oblique Correction DIAGONAL BASE The prism’s lines are diagonal. Such a prescription is achieved by locating the axis of the prism diagonally determining the angle with a Rotation Nomograph. α ALL RIGHTS RESERVED © 9
