Retina Portal

The retina is a thin sheet of nerve tissue in the back of the eye, where light rays are focused and images are transmitted to the brain.  The center of the retina is called the macula.  The vitreous is a gel-like substance that fills the eye and is attached to the retina in several areas including the macula and the optic nerve.

Problems with the retina can take different forms and treatments also vary.The vitreous can separate from the retina.  This is called a posterior vitreous detachment (PVD). The majority of PVD’s have an uncomplicated course.

However, in a small percentage of patients, problems with the retina may develop after a PVD, such as a retinal tear, retinal detachment, epiretinal membrane or a macula hole.  These issues generally need treatment fairly quickly to avoid vision loss.

Diabetes creates conditions that can also negatively impact one’s vision and diabetics should be particularly vigilant about having regular eye exams with a board certified retinal specialists like the ones at Concord Eye Center.

A Posterior Vitreous Detachment (PVD) is a condition of the eye in which the vitreous membrane separates from the retina. There are some conditions that can increase your likelihood of having a retinal detachment.  They include:

  • Nearsightedness
  • Prior cataract surgery
  • Glaucoma
  • Severe injury or trauma to the eye
  • A prior retinal detachment in the other eye
  • A family history of retinal detachment

Some symptoms include:

  • New floater or floaters in the field of vision
  • Flashing or flickering lights in the field of vision
  • A shadow in the periphery of your field of vision
  • Blurred vision or a cloud moving across your field of vision

Retinal tears or detachments are generally treated with either lasers or surgery.  These procedures can correct problems before vision is lost or prevent further deterioration from occurring.

If you experience any of the above symptoms, call us for an appointment.


Diabetes creates conditions that can seriously effect the eyes and it is extremely important that anyone with diabetes has regular eye exams. Early detection and treatment offers the best chance of preserving vision in people with diabetic retinopathy and other eye diseases.

In the United States Diabetic retinopathy is the number one cause of blindness among people between the ages of 20 and 65. It is a serious eye condition that can develop in diabetics – it occurs when blood vessels within the eye begin to leak. The fluid leaking into the eye causes the macula (part of the retina) to swell, obscuring close vision and fine details. This first phase of diabetic retinopathy is called the nonproliferative stage.

In the proliferative stage, new blood vessels begin to form on the retina. These vessels are defective and continue to rupture and leak fluid into the eye. This can eventually lead to retinal detachment, which can cause blindness.

Aside from controlling blood sugar levels, there are several treatments available for diabetic retinopathy, including laser photocoagulation and other laser and conventional surgical procedures.

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If you have diabetes or diabetic retinopathy, and are interested in a screening or treatment options, contact us for an appointment today.