Jackson et al in a meta-analysis of vitreous attachment in DME found the cumulative prevalence of VMT or taut hyaloid
being 18%, with 28.7% of eyes undergoing pars plana vitrectomy had VMT as compared to 12% of non-surgical cases2.In another study sole extrafoveal vitreous traction was found in 34.5% of the patients by using 3-D SD OCT, with extrafoveal sites included both retinal as well as the papillary traction15.
Some possible connected pixels due to highly reflective posterior hyaloid
in thresholded image can be removed by applying length filtering and removing elongated short components.
Internal limiting membrane delamination vs posterior hyaloids
removal.A prospective randomized trial.
In the PPV, cut and flow rates were adjusted according to the patient's condition during core vitrectomy and removal of the vitreous base and hyaloid
. A standard cut rate was not used in the surgeries, but a lower rate was preferred for vitrectomy and a higher rate was preferred for shaving.
4) Cleaving cortical hyaloid
completely from retina changes molecular flux across vitreoretinal interface and improves oxygen supply to retina thereby alleviating retinal hypoxia and overexpression of vasoactive substances.
Bhaduri, "Correlation of macular thickness and posterior hyaloid
change following bevacizumab and triamcinolone in diffuse diabetic macular edema in middle-aged patients," International Ophthalmology, vol.
If the posterior hyaloid
is thin and only slightly detached from the surface of the macula, it is not visible in ophthalmoscopy, but can be easily detected by OCT.
At that time, a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser was used to disrupt the posterior hyaloid
Firstly, the extracellular matrix of the retina is first broken down by the proteases followed by growth of new vessels from the retinal venules and penetrates the internal limiting membrane and form capillary network between the inner surface of the retina and the posterior hyaloid
For example, knowledge of the hyaloid
tract may explain how inflammatory mediators released anteriorly following cataract surgery diffuse posteriorly to the macula, resulting in macular oedema.
(5) Secondary complications of severe fibrinoid reaction include papillary membrane and opacification of the anterior hyaloid
Multiple traction forces, such as posterior bulging, ERM and ILM tangential traction, or posterior hyaloid
oblique traction, are involved in MH with RD in highly myopic eyes.