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[Study of subretinal neovascular membranes secondary to degenerative myopia]
M J Morillo Sánchez1, P Rivera De Zea, A Vázquez Salvi
1Cátedra de Oftalmología, Hospital Universitario de Málaga, Málaga, España.
Purpose:
To study the type, size, location and posterior time evolution of the subretinal neovascular membranes (SRNM) secondary to degenerative myopia (DM) and its relationship with the degree of myopic ametropia.
Methods:
We studied 65 patients (130 eyes) with MD who were divided into three groups according to their refraction. A complete ophthalmologic examination, including a fluorescein angiography (FAG), was performed for all the patients. Based on this test, 55 SRNA were identified, and were classified into two types according to the fluorescein angiography results. Their position was described in relationship to the foveal avascular zone (FAZ) and their size was measured.
Results:
55 (42.3%) of the 130 eyes presented SRNM, which was bilateral in 16.32% of the patients. Based on the FAG criteria, 41 eyes (74.54%) presented type 1 SRNM, 60% (33 eyes) presented subfoveal membranes and the size was greater than 1,500 microns in more than 75%. The development of the SRNM showed no relationship with the myopic ametropia degree (P<0.2500). The follow-up time was 24.61+/-7.63.
Conclusions:
No relationship between the appearance of the development of the SRNM and the myopia degree has been found. These are generally small sized, have poor dye diffusion and are frequently located in the foveal zone. The visual acuity loss is often sudden and maintained over time.
Insights
Subretinal neovascular membranes (SRNM) in degenerative myopia (DM) are typically small, foveally located, and do not correlate with myopia severity. Sudden vision loss is common with these membranes.
Area of Science:
- Ophthalmology
- Retinal Diseases
- Myopia Research
Context:
- Degenerative myopia (DM) can lead to sight-threatening complications.
- Subretinal neovascular membranes (SRNM) are a known complication of DM.
- Understanding SRNM characteristics is crucial for managing vision loss in myopic patients.
Purpose:
- To investigate the characteristics of subretinal neovascular membranes (SRNM) in degenerative myopia (DM).
- To determine the type, size, location, and evolution of SRNM.
- To assess the relationship between SRNM development and the degree of myopic ametropia.
Summary:
- This study analyzed 65 patients with DM, identifying SRNM in 42.3% of eyes using fluorescein angiography (FAG).
- Type 1 SRNM were prevalent (74.54%), often subfoveal (60%) and larger than 1,500 microns (75%).
- No significant correlation was found between SRNM development and the degree of myopia (P<0.2500).
Impact:
- SRNM in DM are generally small, exhibit poor dye diffusion, and are frequently located in the foveal zone.
- Sudden and persistent visual acuity loss is a common outcome associated with these membranes.
- Findings suggest SRNM characteristics and development are independent of myopia severity, aiding in prognosis and management strategies.