Eye Specialist & Ophthalmic Surgeon - Medical Retina · Uveitis · Cataract Surgery

Dr John Chang specialises in the expert diagnosis and treatment of retinal conditions, uveitis and cataract surgery.

Expert diagnosis

Dr Chang and his staff utilise the latest in ocular imaging technology to assist in expert assessment and detailed explanation of the diagnosis to his patients.

1. Digital retinal photography

Digital retinal
Digital images of the retina allow baseline documentation of the condition and Dr Chang uses such photos to help explain the condition to his patients.

2. OCT macular scan

Digital retinal
OCT scan provides high-resolution 3D images of the retina using a rapid, non-contact optical scan. This is a vital tool in the diagnosis and monitoring treatment response in a number of retinal conditions including macular degeneration. For example, OCT demonstrates swelling or thinning of the macular, as well as wrinkling of the retinal surface or macular holes.

3. Fundus autofluorescence imaging

Digital retinal
This specialised retinal imaging technique is important in the diagnosis of certain retinal conditions including macular degeneration, chronic CSR, and inherited retinal conditions such as retinitis pigmentosa (RP).

4. Retinal angiography (FFA & ICG)

Digital retinal
Only a selected subset of patients require retinal angiography. This test involves taking multiple digital photographs of the retina following the administration of an intravenous dye. FFA or ICG allows the assessment of the blood circulation inside the eye, and allows diagnosis of the severity of any blockage or leakiness of the blood vessels, as well as activity of inflammation at the back of the eye.

Retinal angiography can help guide treatment including outlining the areas for targeting with retinal laser.

Retinal laser treatment

Dr Chang provides retinal laser treatments including both argon laser and cold (PDT) laser treatments in his clinics. Retinal laser may be offered in the treatment of various conditions including diabetic retinopathy, retinal vein occlusion, retinal tear, and central serous retinopathy (CSR).

  • Macular laser treatment involves highly precise applications of laser to areas of leaky blood vessels, as may occur in diabetic retinopathy or after retinal vein occlusion, with the aim of reducing retinal swelling and thus prevent vision loss.
  • Pan-retinal (PRP) laser treatment may involve multiple sessions of laser to eliminate abnormal new blood vessels in the eye that, if left untreated, may cause sight-threatening bleeding or painful eye with vision loss.
  • Peripheral laser treatment is used to seal around retinal tear or hole to prevent sight-threatening retinal detachment.

Intravitreal injection therapy for wet macular degeneration

Dr Chang provides his patients with the latest treatments for wet macular degeneration (AMD) including intravitreal injections of Lucentis, Avastin and Eylea. These medications are delivered into the eye where they fight against the abnormal and leaky blood vessels of wet AMD that have grown under the retina. Intravitreal treatment aims to dry up the macular, prevent further vision loss and improve the eyesight. Dr Chang provides these treatments in a safe, gentle and comfortable manner for his patients.

Peri-ocular and intravitreal therapy for retinal conditions & uveitis

Dr Chang is experienced in delivering anti-inflammatory steroid medications to inside or around the eye for the treatment of various conditions including diabetic macular oedema, post-operative macular oedema and severe uveitis.

Cataract surgery

Cataract surgery
Dr Chang provides the complete eye care from careful pre-operative assessment, meticulous performance of cataract surgery, to the provision of appropriate post-operative care and follow-up review. He is particularly experienced in the performance of complex cataract surgery in patients with cataracts that also have other common eye conditions such as macular degeneration, diabetic retinopathy or uveitis.

It is important for any underlying retinal condition to be diagnosed and treated prior to carefully planned surgery, to ensure that the best possible visual outcome is achieved following cataract removal and lens implantation. This is a highly tailored treatment and surgery for each patient, and Dr Chang will discuss these in more detail after his assessment of the individual person.