An aphakic eye with broad iridectomy
and peripheral iridectomy. 

An aphakic eye with corneal oedema as a
result of vitreous touch.

The patient has a cataract extraction without lens implant (examine the wound to see if this
is done through phacoemulsification or otherwise). The patient may be wearing thick lenses or
contact lenses.

In intracapsular cataract extraction, there is usually iridectomy and the presence of vitreous 
in the anterior chamber (examine the cornea for any decompensation due to vitreous touch). 

Some patients may have extracapsular cataract extraction without implant (for example in clear 
lens extraction for high myopia). In such cases, the absence of implant may be missed with a
casual examination. 


  • In young children with aphakia, consider:
    • lens dislocation such as Marfan's syndrome
    • cataract extraction in juvenile chronic arthritis, look for cells and flare in the 

    • anterior chamber and band keratopathy.
  • During the examination, you may be asked to perform a direct ophthalmoscopy on a 

  • high myopic patient with aphakia. The clue to the presence of aphakia is the relatively 
    low minus (concave) power on the ophthalmoscope needed to visualize the fundus.


1. What is the average refractive power of the lens?

2. Assuming the radius of curvature of the cornea is 8mm and refractive indices are 1 (air) and 1.33 (cornea, aqueous and vitreous). What degree of axial myopia can be fully corrected by clear lens extraction?

3. What are the disadvantages of wearing aphakic spectacles?


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