Clinical Trial Summary
The idiopathic macular hole, age-related disease, is a major cause of vision loss and affects
at least two persons in 1000 after 40 years.
This hole causes an acute decline linked to a central scotoma. The only treatment is
surgical. The surgery involves removing the posterior hyaloid (vitreous base) to relieve the
tensile forces. To be sure the removed is complete and to facilitate the closure of the hole,
a peeling of the internal limiting, the outermost layer of the retina, is often suggested.
The inner limiting membrane (ILM), transparent and adherent to the retina, is colored with
vital dyes to facilitate its removal. After closure of the macular hole, the central scotoma
disappears but a diffuse and asymptomatic loss of pericentral sensitivity is often described.
This sensitivity decrease could be induced by the dyes used during surgery.
This effect has not been studied clinically for recent dyes (Membrane Blue Dual®, Brilliant
Blue®, Acid Violet®) at the concentrations used, but is known in electrophysiology at higher
concentrations, at least on the isolated retina models.
It would be interesting to search for a decrease in retinal peri-foveal postoperative
sensitivity after surgery of macular holes, performed with the usual dyes. Only
microperimetry can observe this decrease in retinal sensitivity. This is a noninvasive
technique that explores the macular visual field. It is performed without iris dilatation and
allows an automatic exploration ensuring rapid and accurate analysis of retinal sensitivity.
