Glaucoma

Glaucoma is a condition in which the optic nerve is damaged by an abnormally high intra-ocular pressure.

Acute glaucoma is of sudden onset and painful. It causes blurring of vision, light sensitivity, as well as nausea and vomitting. It is important to seek medical assisstance immediately to prevent permanent visual imapirment.

Chronic glaucoma is of slow onset and not painful. It may be totally silent during the early stages until the patient incidentally notices visual field loss at late stages. Early stages of chronic glaucoma can be picked up by eye pressure monitoring and investigations such as visual field and optical coherent tomography.

Glaucoma Examination Eye pressure
Non-contact eye pressure monitor

Visual field
The visual field is impaired in glaucoma patiets as a result of high eye pressures

OCT

Fundus Camera
The optic disc appears pale and the cup-to-disc ratio is increased in glaucoma

Visual field loss of glucoma patient may occur unconsciously. Therefore, regular comprehensive eye check is very important to glaucoma patient.



Macular Degeneration

The macula is the central portion of the retina. It is responsible for over 90% of visual acuity and colour perception. The symptoms of macular diseases include:

  • Central "black hole"
  • Distortion of image
  • Abnormal colour sensation




Normal Distortion of image Central "black hole"

Examinations for Macular Diseases

The Hong Kong Eye Practice is equipped with the Hong Kong’s first Carl Zeiss Cirrus HD-OCT 5000 which is used extensively for clinical decision making and monitoring of many posterior segment diseases.
OCT (Optical Coherent Tomography) Left: Normal macula, Right: Epiretianal membrane of macula
Fundus Camera
Normal macula Dry macular degeneration
Wet macular degeneration Macular scar
FFA/ICG FFA/ICG is used for clinical decision making between dry and wet macular degeneration



Contact Lens Care

Improper use of contact lenses may cause:

  • Dry eyes
  • Eye allergy
  • Growth of new blood vessels in the cornea
  • Swelling of the cornea can result from a decrease in endothelial cells

Eye examinations for contact lens wearers

Slit-lamp

Improper contact lens wearing schedule may cause corneal neovascularization or infection.


Specular Microscope

Specular Microscope is used to investigate corneal layer.


Pentacam HD and Atlas 9000 corneal topographers

Corneal topographers is used to investigate corneal parameters and any risk of getting corneal disease such as keratoconus.


Pentacam HD and Atlas 9000 corneal topographers

Penracam HD




Eyes Protection Tips
  • Make sure there bis sufficient lighting when reading
  • Take a 10 minute break from your computer work/reading in 2 hour intervals
  • Avoid rubbing your eyes,Allergic eye symptoms can be effectively controlled by appropriate eyedrops
  • Keep a minimal distance of 50 to 70cm between your eyes and the screen
  • Outdoor activities help slow down the progression of short-sightedness. Remember to wear UV protective sunglasses in sunny environments.
  • Balanced diet, food rich in vitamins A, C and E are good for the eyes
  • Contact lens wearers should have regular eye check-ups