This term refers to any type of surgery involving the lens of the eye, such as cataract; the cornea (transparent window of the eye), the iris (colored portion with central hole) or the drainage structures (angle of the eye).

Many of these eye conditions can be inherited or trauma can affect the iris or lens and require medical or surgical correction. In addition, some patients may have had a complication from a previous cataract surgery, requiring additional anterior segment surgery to improve visual outcomes. Even after uncomplicated surgery, some patients may experience blurry vision, visual distortions, or aberrations secondary to the intraocular lens placed in the eye, requiring a lens exchange to improve vision. 

Dr Michael Spencer has performed a wide range of anterior segment surgery, including cataract surgery (both standard and complex), intraocular lens exchange after previous cataract surgery, management of dislocated intraocular lenses, secondary intraocular lens placement, and iris repair or iris replacement.