Regarding rhegmatogenous retinal detachment, the MOST common break type causing RRD in a highly myopic young adult is:

• A Dialysis at the ora serrata
• B Macular hole
• C Horseshoe (flap) tear at the posterior edge of lattice degeneration ✓
• D Operculated hole at the base of a cyst

Explanation

In young myopic patients, lattice degeneration (peripheral retinal thinning and vitreous adhesion) is the most common predisposing lesion. Dynamic vitreous traction at the posterior edge of lattice degeneration creates horseshoe (flap) tears. These breaks allow liquefied vitreous to pass through and dissect under the neurosensory retina. Dialyses are more common in young patients after blunt trauma. Macular holes cause tractional macular RRD mainly in highly myopic women. Operculated holes have no vitreous traction and rarely cause RRD.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.