Purpose: To report a rare case of intraocular lens (IOL) calcification in the presence of asteroid hyalosis with in-vivo measurements of straylight before and after treatment. Observations: A patient with asteroid hyalosis presented with complaints of disability glare due to calcifications on the posterior surface of the IOL. Straylight. measured with the C-Quant. https://www.sahmbuffy.com/product-category/led-corrosion-proof-fitting/