Riged Intraocular Lens (PMMA)
The single piece PMMA FH 105 and FH 106 posterior chamber equiconvex (biconvex) lens with modified “C” loops, flexible step vaulted and highly polished that facilitate easy insertion with minimum mechanical stress to the capsular bag. The lenses don’t require positioning holes to facilitate placement but are designed so that placement of the upper haptic can be easily achieved, delivering the lens into the capsular bag, either by direct positioning with forceps or by dialing the lens into place.
POSITIONING HOLES
Our lenses do not require positioning holes and dialing is easily achieved with the use of a “T” profile lens positioning hook, by engaging the lens at the gusset (the acute angle between the haptics and the optic of the IOL at their junction). By this means the IOL can be pushed or pulled into position. The sole argument for the incorporation of positioning holes in IOLs is that they facilitate placement of the lens. There are however, proven clinical disadvantages to the incorporation of positioning holes including:
The design of our IOLs and their high quality surface finish help reduce the incidence of posterior capsule opacification.
Fred Hollows IOLs are made of clinical grade Perspex CQUV. This and their design & finish ensure that the outcome for YAG capsulotomy will be comparable with, or better than, other posterior chamber IOLs. Our single piece technology provides the most flexible haptics to facilitate easy insertion and rapid centration. They are lathe cut to computer controlled parameters, polished using revolutionary polishing system that guarantees the very best surface and edge finish available. Lenses are quality control tested during each phase of manufacture and ethylene oxide & steam sterilized to ensure a product of the highest quality and efficacy.
POSITIONING HOLES
Our lenses do not require positioning holes and dialing is easily achieved with the use of a “T” profile lens positioning hook, by engaging the lens at the gusset (the acute angle between the haptics and the optic of the IOL at their junction). By this means the IOL can be pushed or pulled into position. The sole argument for the incorporation of positioning holes in IOLs is that they facilitate placement of the lens. There are however, proven clinical disadvantages to the incorporation of positioning holes including:
- The IOL positioning hook may become caught or jammed in a positioning hole (this is not possible with gusset dialing).
- In the case of unintentional asymmetric lens fixation due to poor lens design or surgical complication the periphery of the IOL may be visible in the pupil. This may occur particularly if the pupil is enlarged, fixed or distorted. In these cases, positioning holes may cause visual symptoms including flare, glare sensitivity, image distortion or multiple images.
- The presence of positioning holes may provide a nidus for physical contaminants and bacteria. Inflammation and infection may result.
- Poorly finished positioning holes with sharp or unpolished edges may also cause tissue chaffing or promote inflammation in either the anterior or posterior segment of the eye.
The design of our IOLs and their high quality surface finish help reduce the incidence of posterior capsule opacification.
Fred Hollows IOLs are made of clinical grade Perspex CQUV. This and their design & finish ensure that the outcome for YAG capsulotomy will be comparable with, or better than, other posterior chamber IOLs. Our single piece technology provides the most flexible haptics to facilitate easy insertion and rapid centration. They are lathe cut to computer controlled parameters, polished using revolutionary polishing system that guarantees the very best surface and edge finish available. Lenses are quality control tested during each phase of manufacture and ethylene oxide & steam sterilized to ensure a product of the highest quality and efficacy.
