22 Questions
What is the characteristic of a Morgagnian type of cataract?
Liquefaction of the cortex in a milky fluid in which the nucleus sinks by gravity
Which type of cataract is associated with a gradual painless diminution of vision?
Intumescent cortical cataract
What is the clinical feature of a posterior subcapsular cataract?
Near vision affection
What is the result of excessive nuclear sclerosis and yellowing in a cataract?
Central opacity
Which symptom is associated with a cataract?
Uniocular diplopia
What is the characteristic of an Intumescent cortical cataract?
Rapid breakdown of lens proteins resulting in rapid increase in osmolarity
What is the characteristic ofSenile Cataract opacification?
It is a result of degeneration of the lens fibers with hydration and opacification
What can be seen in the pre-cataractous changes stage of Senile Cataract?
Lamellar separation and water vacuoles
What is the characteristic of the immature stage of Senile Cataract?
The whole cortex becomes opacified, except a zone of superficial cortex under the lens capsule
What is the vision in the immature stage of Senile Cataract?
It is as high as 6/18 or even 6/12
What is seen in the mature stage of Senile Cataract?
The entire cortex from the capsule to the nucleus becomes opaque white
What is the characteristic of Senile Cataract regarding the laterality?
It is bilateral, but unsymmetrical
What is the main cause of nuclear cataract?
Error of metabolism or toxins from the mother
What is the characteristic of lamellar cataract?
A layer of opacification involving the foetal nucleus, with arcuate opacities all around its equator
What is the characteristic of coronary cataract?
Club-shaped opacities near the periphery of the lens with their broad ends towards the centre
What is the characteristic of anterior polar cataract?
A delay in the disappearance of the lens stalk in both the lens capsule and subcapsular cortex
What is the characteristic of blue dot cataract?
Multiple small bluish dots scattered all over the lens
What is the characteristic of posterior polar cataract?
A delay in the disappearance of the hyaloid artery
What is the effect of posterior polar cataract on visual acuity?
It has a greater effect on visual acuity due to its larger size and closer location to the nodal point of the eye
What is the characteristic of membranous cataract?
A sheet-like appearance with the anterior and posterior capsules fused together
What is the cause of maternal infection with rubella virus?
Maternal infection with rubella virus during the first trimester
What is the characteristic of aniridia?
Complete or partial absence of the iris
This quiz covers the characteristics of hypermature Morgagnian cataract, including its effects on visual acuity and the progression of the condition. Learn about the symptoms and appearance of this type of cataract.
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