Data from: Observational study of clinical characteristics of dome-shaped macula in Chinese Han with high myopia at Zhongshan Ophthalmic Center

Purpose: To evaluate the prevalence of dome-shaped macula (DSM) in highly
myopic eyes among Chinese Han and to detect the correlation with myopic
maculopathy and macular complications. Methods: A total of 736 Chinese Han
patients (1384 eyes) with high myopia (refractive error <-6.0
diopters or axial length ≥26.5mm) are reviewed based on information
entered into a high myopia database at Zhongshan Ophthalmic Center.
Subfoveal choroidal thickness (SFCT) and parafoveal choroidal thickness
(PFCT) are measured. The prevalence of DSM in patients with myopic
maculopathy categorized from C0 to C4. Clinical features, including
macular complications, SFCT and PFCT, are compared between myopic eyes
with and without DSM. Results: Among the 1384 eyes, 149 (10.77%) show DSM.
In highly myopic eyes without macular complications, the best corrected
visual acuity is significantly worse in patients with DSM (P=0.002), and
the ratio between subfoveal and parafoveal choroidal thickness (S/PCT) is
significantly elevated in patients with DSM (P=0.021). The proportion of
foveal schisis (17.24% vs. 62.86%) is much lower in eyes with DSM compared
to those without DSM. However, the proportions of extrafoveal schisis
(39.66% vs. 5.37%), foveal serous retinal detachment (SRD) (5.17% vs. 0)
and epiretinal membrane (ERM) (24.14% vs. 10.74%) are much higher in eyes
with DSM. The proportion of DSM was lower in C0 and C1, but higher
proportion of DSM was found in C3 and C4. Conclusions: DSM is found in
10.77% of highly myopic eyes among Chinese Han. DSM might be a protective
mechanism for foveal schisis and a risk factor for extrafoveal schisis,
SRD and ERM.