Category | Location | Comment |
Anterior polar | Anterior poles; usually bilateral | Often hereditary |
Persistent fetal vasculature | Posterior; unilateral | Associated with microphthalmia and glaucoma |
Posterior polar | Unilateral posterior pole (Mittendorf dot) | |
Bilateral posterior pole | May be associated with defects in the posterior capsule | |
Posterior lentiglobus/lenticonus | Posterior capsule; mainly unilateral | Usually sporadic |
Posterior subcapsular | Immediately anterior to posterior capsule | Associated with inflammatory conditions, glucocorticoids use, ionizing radiation |
Total (diffuse, complete) | Involve entire crystalline lens | Usually seen after trauma |
Zonular cataracts | ||
Lamellar | Layer of cortex peripheral to the Y sutures of the lens; usually bilateral | May be hereditary (autosomal dominant) or acquired |
Nuclear | Embryonal or fetal nucleus; unilateral or blateral | Microphthalmia and microcornia are usually present |
Sutural | Y sutures |
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