Occlusion foil
Occlusion foils (Bangerter foils) are self-adhesive (adhesive) foils that are stuck directly onto a lens for occlusion treatment. They represent an alternative to eye patches for amblyopias with central fixation or for follow-up treatment. If the patch occlusion has primarily been successful, it can be used as a so-called tapering occlusion . Here, for example, the coverage intervals for the visually impaired guide eye can be gradually shortened. Another possibility is to use adhesive films on the lens of the guide eye, which are used as the treatment progresses from opacity to variants with increasing transparency ( perception ). In children with increased eye tremors (nystagmus) under the usual plaster occlusion, they represent a helpful - as less dissociative - alternative. They are also often better tolerated by children because they are cosmetically less noticeable than plasters.
Another possible application of occlusion foils is to switch off double images ( diplopia ), for example in the case of eye muscle paralysis .
Perception
The perception is given in numerical values:
- <0.1 opaque, usually skin-colored, e.g. Some also have a motif for children
- LP (light perception, no visus level yet)
- 0.1
- 0.2
- 0.3
- 0.4
- 0.6
- 0.8
1.0 would be the full light transmission (without foil)
literature
- Herbert Kaufmann (Ed.): Strabismus. With the collaboration of Wilfried de Decker et al. Enke, Stuttgart 1986, ISBN 3-432-95391-7 .
