29/04/2026
Something we unfortunately are seeing more and more of in practice!
Luckily our enhanced sight tests including OCT scanning can help to identify exactly which one we are dealing with and monitor or refer on as necessary.
Lamellar Macular Hole vs Full-Thickness Macular Hole
Macular holes are foveal defects that may significantly affect central vision and are best characterized using optical coherence tomography (OCT).
They are broadly divided into lamellar macular holes (LMH) and full-thickness macular holes (FTMH) based on the extent of retinal involvement.
- A lamellar macular hole represents a partial-thickness defect of the fovea. It is commonly associated with tangential traction from an epiretinal membrane and may show splitting of the inner retinal layers.
On OCT, there is an irregular foveal contour with loss of inner retinal tissue, while the outer retinal layers, particularly the photoreceptor layer, remain largely intact. Visual acuity is often relatively preserved, though patients may report mild metamorphopsia.
- A full-thickness macular hole (FTMH) is a complete defect extending from the internal limiting membrane to the retinal pigment epithelium at the fovea. It typically results from anteroposterior vitreomacular traction, often in the setting of posterior vitreous detachment.
OCT demonstrates a full-thickness interruption of the retinal layers with associated cystic changes at the margins. Clinically, patients present with reduced central vision, central scotoma, and distortion. Visual loss is usually more pronounced compared to lamellar holes.
Eyeball world