For unilateral cataracts, laboratory studies include TORCH titers and Venereal Disease Research Laboratory (VDRL) test.
For bilateral cataracts, laboratory studies include CBC, BUN, TORCH titers, VDRL, urine for reducing substances, red cell galactokinase, urine for amino acids, calcium, and phosphorus.
CT scan of brain may be performed.
See the list below:
With screening of genes associated with cataract: Fourteen common genes that include crystallin alpha A ( CRYAA), CRYAB, CRYG s, CRYBA1, CRYBA4, CRYBB1, CRYBB2, CRYBB3; beaded filament structural protein 1 ( BFSP1); gap function protein; alpha 3 ( GJA3) and GJA8; and heat shock transcription factor 4, as well as other genes, can be amplified. 
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