Conjunctivodacryocystorhinostomy (CDCR) is a surgical procedure that involves a complete bypass of the tear drainage system. This technique is reserved for cases where there is nonexistence of the drainage system. This can occur from trauma, cancer surgery, chemotherapy, or chronic inflammation.
WHAT IS A CDCR?
Myasthenia gravis is a neuromuscular disorder characterized by muscle weakness and fatigue, and when it specifically affects the eyes, it is referred to as ocular myasthenia gravis (OMG). In OMG, the muscles that control eye movement and eyelid function are primarily affected, leading to symptoms such as drooping eyelids (ptosis), double vision (diplopia), and difficulty in maintaining a steady gaze.
The weakness tends to fluctuate, worsening with prolonged use and improving with rest. Ocular myasthenia gravis may eventually progress to involve other muscles in the body, but in some cases, it may remain limited to the eyes.
WHAT DOES THE PROCEDURE INVOLVE?
A CDCR involves the placement of a glass tube, known as a Jones tube, from the caruncle in the nasal corner of the eye to the nasal cavity. CDCR surgeries are typically very successful, but also have a high failure rate. The tube can become displaced or become obstructed, and additional procedures and adjustments may need to be performed.
