10 Questions
What is the diameter of the lens?
9 - 10 mm
What is the medical term for reduced transparency of the lens?
Cataract
What is the function of the lens?
Refraction; Accommodation, protection
What is the etiology of congenital cataract?
- Idiopathic 2. Autosomal dominant 3. Chromosomal abnormalities 4. Metabolic disorders
What is the embryonic nucleus of the lens substance?
Embryonic nucleus
Which part of the lens is responsible for providing nutrition to the structure?
The sub-capsular epithelium
In the context of lens physiology, which structure is described as an avascular structure relying on diffusion for nutrition?
The lens substance
What is the primary cause of congenital cataract according to the given text?
Idiopathic
What is the primary function of the suspensory ligaments (Zonule of Zinn) with regard to the lens?
To fix the lens in place and connect it to the ciliary body
Which part of the lens is described as a highly elastic membrane that is thinner posteriorly?
The capsule
Study Notes
Lens Structure and Function
- The diameter of the lens is approximately 10mm.
Lens Clarity
- The medical term for reduced transparency of the lens is cataract.
Lens Function
- The function of the lens is to change shape to focus light on the retina.
Congenital Cataract
- The etiology of congenital cataract is often associated with genetic mutations, intrauterine infections, and metabolic diseases.
- The primary cause of congenital cataract is usually genetic factors.
Lens Development
- The embryonic nucleus of the lens substance forms from the ectoderm.
Lens Nutrition
- The part of the lens responsible for providing nutrition to the structure is the aqueous humor.
- The lens is an avascular structure relying on diffusion for nutrition.
Lens Support
- The primary function of the suspensory ligaments (Zonule of Zinn) is to hold the lens in place and change its shape for focusing.
Lens Membrane
- The lens capsule is a highly elastic membrane that is thinner posteriorly.
Test your knowledge of the gross and minute anatomy of the lens with this quiz. Covering topics such as the structure, dimensions, and diopter power of the lens, this quiz will challenge your understanding of this vital ocular component.
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