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Dispersion = Abbe Number or Constringency Value and Nu Value

- Point -  Dispersion is categorized by Abbe Number or as it is also known by Constringency Value or Nu Value. - Point Word- Dispersion Abbe Number Constringency Value Nu Value - Explanation -  Dispersion refers to the state in which light is scattered or spread out. It refers to the separation of the constituent colors of light, like a rainbow.  Abbe Number is an optical property that describes how much a transparent material scatters light. It is a measure of chromatic dispersion. A higher Abbe Number indicates less dispersion and less chromatic aberration.
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Ptosis


- Point -

Ptosis - A drooping lid

Corrected by using a ptosis crutch



- Point Word-

  • Ptosis

  • A drooping lid

  • Corrected crutch



- Explanation -

Photograph of the patient showing right partial ptosis. The left lid shows compensatory pseudo lid retraction because of equal innervation of the levator palpabrae superioris (Herring's law). b. Post tensilon test: Note the improvement in ptosis.

Image above : Photograph of the patient showing right partial ptosis. The left lid shows compensatory pseudo lid retraction because of equal innervation of the levator palpabrae superioris (Herring's law). b. Post tensilon test: Note the improvement in ptosis.

Credit : Wikimedia, wikimedia website   link


Ptosis   <--- Cleveland Clinic




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