Disease of Lens & Cataract

Cause:
Opacity of the lens due to disturbance Influx of water, leading to protein degeneration and cell apoptosis

Immature cat

Intumescent cat

Mature cat

Senile cortical Cat: Mature cat & Hypermature cat

Hypermature cat (morgagnian)

Posterior subcapsular cat

Early nuclear cat

Dense nuclear cat , Dense nuclear cat (Brunescent)

1- Subluxation (aphakia) - marfans syndrome 4- rosette shape in blunt truama

Cause:

Type:

Zonular dehiscence: can allow the lens to move anteriorly, posteriorly, or laterally, depending on the location and extent of zonular fiber loss.

Subluxated lens Cause: Marfan syndrome

Subluxation of the lens: the lens remains in its normal position behind the iris.

Feature	Zonular Dehiscence	Lens Subluxation
Definition	Focal rupture or loss of continuity in one or more zonular fibers, often localized.	Partial displacement (up to 50%) of the lens from its normal position due to generalized zonular weakness or break.
Pathophysiology	Localized zonular break → segment of lens edge unsupported → phacodonesis in that sector.	Diffuse zonular compromise → lens tilts or shifts but remains partially within the pupillary space.
Etiologies	• Trauma (blunt/sharp)