Intraocular Pressure (CCT) Correction

Correct intraocular pressure for corneal thickness.

校正眼压（线性校正法）= 实测 IOP −（CCT − 544）÷ 10 × 0.7 mmHg；以 544μm 为标准角膜厚度，每偏差 10μm 校正约 0.7mmHg，厚角膜实测值偏高需下调、薄角膜实测值偏低需上调。

实测眼压（mmHg）

中央角膜厚度 CCT（μm）

Item	Formula / Rule	Source / Standard
Correction direction	Thin corneas make Goldmann readings underestimate true IOP; thick corneas overestimate	Ehlers et al., Acta Ophthalmologica, 1975
Empirical slope	Every 10 µm of central corneal thickness shifts the reading by about 0.3 to 0.5 mmHg	Kohlhaas et al., Dresden correction, 2005
Target pressure	Corrected values are indicative only; target IOP is set 20% to 30% below baseline	AAO Glaucoma Preferred Practice Pattern, 2015

📚 深度解析：眼压校正（中央角膜厚度）

IOP=18、CCT=560μm

校正 = 18 − ((560−544)/10)×0.7 = 18 − 1.6×0.7 = 18 − 1.12 = 16.88 mmHg（厚角膜实测偏高，校正后下调）。

CCT=500μm

校正 = 18 − ((500−544)/10)×0.7 = 18 + 3.08 = 21.08 mmHg（薄角膜实测偏低，校正后上调）。

眼压校正