Labelled Diagram of the Eye

Labelled diagram of the structure of the retina

Lenticonus is an abnormality of the lens of the eye in which it has a steeper curvature than is normal and bulges forward in the shape of a blunted cone.

Lenticonus may also be described as "a conical projection of the anterior or posterior surface of the lens [of the eye]".

Because lenticonus may affect either the front surface (anterior) of the lens or, occasionally, the back surface (posterior) of the lens, it may be classified as:

  • Anterior lenticonus
  • Posterior lenticonus

Of these two possibilities, anterior lenticonus is more common and may be associated with Alport's syndrome.


Note the importance of the shape of the distortion of the lens:

If the bulging of the lens is spherical rather than conical the condition is called lentiglobus. See also, for comparison keratoconus and keratoglobus.

Lenticonus is a rare condition that is usually congenital, which means "present since birth".

More about Ophthalmology:

This section includes short definitions of many diseases, disorders, and conditions of the eyes and visual system.
For definitions of other terms in this category, choose from the list to the left (but note that this is not a complete/exhaustive list).

Other related pages include

For further information see also our pages of books about ophthalmology.

The following books may also be of interest:

The Aging Eye (Harvard Medical School)
MCQ Companion to the Eye (Textbook)
The Secret of Perfect Vision: How You Can Prevent and Reverse Nearsightedness
What Your Doctor May Not Tell You About(TM) Glaucoma: The Essential Treatments and Advances That Could Save Your Sight

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