What methods are used to treat central nystagmus?
May 16, 2022
Source: Cainiu Health
Dr. Chen You
Introduction
Treatment of central nystagmus should be etiology-based and symptomatic. However, due to the difficulty patients with null-point nystagmus experience in maintaining their preferred head position, surgical intervention may be considered for this subset of patients. The goal of surgery is to correct the compensatory head posture by repositioning the eyes to the “null zone,” thereby reducing nystagmus amplitude and improving visual acuity. The extraocular muscles on the slow-phase side are relatively stronger, whereas those on the fast-phase side are comparatively weaker.
The central nervous system (CNS) is one of the body’s vital systems; abnormalities or pathological changes within it can lead to central nystagmus. So, what treatment options are available for central nystagmus?
What Are the Treatment Options for Central Nystagmus?
Treatment of central nystagmus should be etiology-based and symptom-targeted. However, the specific therapeutic approach depends on disease severity. In severe cases, surgical intervention may be indicated—primarily aimed at correcting the compensatory head posture by repositioning the eye to its “null zone” (i.e., the gaze position where nystagmus intensity is minimal), thereby adjusting ocular alignment, reducing nystagmus amplitude, and improving visual acuity. Because the extraocular muscles on the slow-phase side are relatively stronger, those on the fast-phase side tend to be weaker. To restore muscular balance, recession of the two extraocular muscles on the slow-phase side may be performed to reduce their excessive tension. This shifts the “null zone” from an eccentric gaze position to a primary (forward) gaze position. For milder cases, treatment with Fresnel prisms (membrane-type press-on prisms) may be considered.
Central nystagmus is an involuntary, rhythmic, oscillatory movement of the eyes resulting from pathology affecting the central nervous system. It is generally classified as horizontal, vertical, or torsional—with horizontal nystagmus being the most common. The direction of the fast phase typically defines the direction of nystagmus, whereas the slow phase represents a compensatory movement that restores foveal fixation. Nystagmus commonly arises from disorders involving the visual system, extraocular muscles, vestibular system, or central nervous system.
During treatment, avoid overstraining the eyes. We hope this information proves helpful to you!
