lens nucleus

Nuclear sclerosis is an age-related change in the density of the crystalline lens nucleus that occurs in all older animals.

To better appreciate the three-dimensional nature of the fiber cells of the inner lens nuclei and their surface characteristics, stereo images have been included (Fig.

Over time, this becomes hard or 'sclerotic' due to condensation of lens nucleus and deposition of brown pigment within the lens.

After removing all hard central lens nucleus with phacoemulsification, the softer outer lens cortex is removed with suction only.

It is possible that the processing may dehydrate the presbyopic lens nuclei; however, the potential structural changes may occur on too small a scale to significantly affect the gross measurements made here.

It consists of fashioning two orthogonal and deep central grooves in the crystalline lens nucleus, followed by mechanical fracturing of the cataract with the phacoemulsification probe and second instrument.

Six human nuclear cataractous lens nuclei from patients with diabetes, ranging in age from 54 to 61 years, were obtained following extracapsular extraction from Duke Eye Center (Durham, NC).

In phacoemulsification, the surgeon performs an anterior continuous curvilinear capsulorhexis, to create a round and smooth opening through which the lens nucleus can be emulsified and the intraocular lens implant inserted.

After phacoemulsification of the lens nucleus and cortical material is completed, a dual irrigation-aspiration (I-A) probe or a bimanual I-A system is used to aspirate out the remaining peripheral cortical material.

Results Morphological changes in diabetics with cataracts Examination of the peeled and split lens nuclei by SEM revealed an ideal and reproducible dissection procedure for the exposure of FN and EN fibers along their length near the mid-sagittal plane.