散光

散光

甚麼是散光?

散光是一種常見的屈光不正問題,這情況是因為角膜或晶體不能平均地把各方向的光線聚焦在視網膜之上

成因及風險因素

為何會有散光?

散光的發生,是因為光線穿透角膜或晶體時屈折不平均,正常的角膜表面像球體般弧度平均一致,有散光的角膜弧度卻不一致,會導致影像模糊或變型

易患上散光的人士?

受近視影響的群組,包括成人及兒童,患有輕度散光的人士未必察覺視力異常,定期找眼科專業人士檢查眼睛能夠偵測到早期 / 初起的散光,從而作出合適的處理

 

散光症狀與檢查

散光會出現甚麼症狀?

部份散光可能出現的症狀包括:

  • 頭痛
  • 眼睛易疲勞
  • 在遠、近距離皆會出現影像模糊或變形的情況
  • 視力下降,構成夜間駕駛困難

若您有以上症狀,請諮詢您的專業視光師。如果您正配戴眼鏡或隱形眼鏡但尚有此問題,您可能需要配備一副新的鏡片。

如何診斷患有散光

眼科專業人員(例如:視光師 / 眼科醫生)可以透過屈光及全面眼睛檢查,準確診斷病人患有近視或其他屈光不正問題。時刻留意視力的變化,或有助偵查出其他眼睛健康問題,如發覺任何眼睛問題,請聯絡眼科專業人員作詳細檢查!

您會患上散光而不自知嗎?

有可能有輕微散光而未能察覺,特別是沒注意到自己視力有異的小童,有些成年人也可能會有輕微散光但沒有任何症狀。所以,進行全面眼睛放瞳檢查對眼睛的健康很重要。

治療

如何矯正散光?

近視可以透過眼鏡,隱形眼鏡及激光矯視手術矯正,不同的生活方式亦影響如何選擇合適的矯正方法。


資料來源:美國國家眼科研究所

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