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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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Aphakia, Pseudo Aphakia


- Point -

 Aphakic patients have had their crystalline lens removed.

 Pseudo aphakes have an implant to replace the crystalline lens.



- Point Word-

  • Aphakia.

  • Crystalline lens removed.

  • Pseudo aphakes have an implant to replace the crystalline lens.



- Explanation -

Aphakia is an eye without a lens within the eyeball.

 Aphakia is an eye without a lens within the eyeball.




Pseudo Aphakia is an eye with an artificial lens implanted (IOL).

 Pseudo Aphakia is an eye with an artificial lens implanted (IOL).





Aphakia   <--- Cleveland Clinic








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