A dual optical accommodating foldable intraocular lens right age to start dating
Typically, these patients show losses in contrast sensitivity for distance vision, in exchange for improved near vision.Modulation of the number and dimensions of the near and distance zones in refractive IOLs has been performed by manufacturers in an attempt to optimize the performance of these lenses.They open with a snap while unfolding hence one has to be careful while implantation.An interesting feature of silicone material is its malleability and elasticity, which makes them a good choice for the accommodating lenses since these lenses would have to deform millions of time over the life time of the patient. Little, it was estimated that the average frequency of accommodation is probably on the order of 20-120 per hour (1 cycle every 3 min to one every 30 s).Multifocal IOLs Multifocal IOLs are used in an attempt to simultaneously provide good distance and near vision in a pseudophakic patient.Various designs have been tried to achieve this multifocality, however, the designs fall into two categories : r0 efractive multifocal and diffractive multifocal.
The Rezoom (Abbot Laboratories Inc., Illinios, USA) and Preziol (Care Group, Vadodara, Gujarat, India) Lenses are perfect examples of refractive multifocal lenses.
Toric IOLs have different powers along different meridians and can therefore, correct for cylinder error. First, accurate alignment and fixation of the lens is required.
The axis of the IOL must be aligned with the axis of the cylinder error or a reduced correction will be seen.
Certain features of the silicone material put them at a disadvantage.
They tend to turn opalescent or have a slight tinge after a period of time.