Nearsightedness (Myopia) - Surgery

Several types of surgery for nearsightedness (myopia) can change the shape of the cornea and refocus light directly on the retina . But surgery cannot correct pathological myopia.

The goal of surgery is to allow people who are nearsighted to see clearly without corrective lenses or to be less dependent on corrective lenses.

Most doctors consider 20/40 vision or better after surgery a satisfactory result. People with 20/40 vision or better are allowed to drive a car without corrective lenses. Overall, most people who have surgery achieve 20/40 vision or better after surgery.

Laser surgeries include:
LASIK (laser in-situ keratomileusis), which is currently the most commonly used corrective surgery for nearsightedness. LASIK has a high success rate and low complication rate for low to moderate nearsightedness. It may also be used to correct more severe nearsightedness. In general, it requires less healing time, is less painful, and offers a faster visual recovery than photorefractive keratectomy (PRK).

PRK (photorefractive keratectomy), LASEK (laser epithelial keratomileusis), and epi-LASIK (epithelial laser in-situ keratomileusis), which are similar surgeries. They are another type of corrective surgery for nearsightedness that is used frequently. Like LASIK, these surgeries have high success rates and low complication rates for low to moderate nearsightedness. They may be used instead of radial keratotomy (RK) to correct severe myopia.

Reference information: http://www.webmd.com/eye-health/ www.eye.123.com.hk

It is not intended as medical advice to any specific person. If you have any need for personal advice or have any questions regarding your health, please consult your Ophthalmologist for diagnosis and treatment.

弱視

弱視多是由於雙眼度數偏差過大或由斜視演變出來。雙眼度數不一，是屬於正常的，但若相差太遠，雙眼所見影像大小不同，腦袋訊息混亂，選擇依賴度數較淺眼睛，較深的眼睛長期不用，最終無法建立立體視覺，造成弱視。如果小朋友過了治療的黃金期便不能治癒。

弱視測試：

眼科醫生建議家長可於三歲起定期帶小朋友接受視力測試和詳細評估，接受眼睛結構、眼底、視覺及屈光度數、眼壓測試、色覺普查、雙眼協調等眼晴檢查，確保眼睛發展健康，以防過了弱視治療的黃金期。醫治弱視的黃金期是大約七歲。

弱視治療：

兒童建議先配戴眼鏡和使用遮眼訓練來矯正弱視,，遮眼訓練治療只適用於八歲以下的小朋友。過了八歲後，弱視治療的成效會降低，從此便不能治癒,。兒童雙眼應在六、七歲時視力發展相若。家長應於子女3歲見眼科醫生，接受全面的眼科檢查。及早發現眼疾問題，可盡快開始治療，避免因弱視而導致永久性視力影響。雖然有信息提及針灸可能對治療弱視有幫助，但目前並沒有充分的醫學文章證明這一點及沒有被普遍採用。

參考資料: http://eye-check.org/index.html

以上所提供的資訊僅作為教育及參考用途，如果你有任何醫療問題，應向自己的眼科醫生查詢，而不應單倚賴以上提供的資料。