非接触眼压测量
眼科项目
≈ ¥20-50
(≈ $3-7)
大约15-30分钟
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项目介绍
非接触眼压测量在一般公立医院参考费用约¥15-40，三甲医院参考费用约¥20-50，常用于相关诊断评估与就医安排，费用随医院及地区有所差异。
主要用途
Non-contact tonometry (NCT) is primarily used for rapid, non-invasive screening of intraocular pressure in routine eye exams, glaucoma risk assessment, pre- and post-operative monitoring (e.g., cataract or refractive surgery), large-scale population screenings, and pediatric or anxious patients who cannot tolerate contact methods. It serves as an initial triage tool but is not a standalone diagnostic test for glaucoma — abnormal results require confirmation with Goldmann applanation tonometry and comprehensive optic nerve/visual field evaluation.
正常值范围
Typical intraocular pressure (IOP) measured by non-contact tonometry (NCT) ranges from 10 to 21 mmHg in healthy adults. Values between 12–20 mmHg are most common; readings <10 mmHg or >21 mmHg warrant further evaluation. Note: NCT may slightly overestimate IOP compared to Goldmann applanation tonometry (GAT), especially at extremes, and results can vary with corneal thickness, tear film stability, and patient cooperation.
偏低可能原因
Hypotony (IOP <6 mmHg) may result from: 1) Post-surgical complications (e.g., bleb leak after trabeculectomy or wound leak after cataract surgery), 2) Chronic uveitis with ciliary body suppression, 3) Retinal detachment causing reduced aqueous production, 4) Severe ocular trauma with cyclodialysis cleft, 5) Advanced glaucoma drainage device overfiltration.
偏高可能原因
Elevated IOP (>21 mmHg) on NCT may indicate: 1) Primary open-angle glaucoma (POAG), 2) Ocular hypertension (OHT) — elevated IOP without optic nerve damage, 3) Angle-closure glaucoma (acute or chronic), 4) Secondary glaucomas (e.g., pigmentary, pseudoexfoliative, steroid-induced), 5) Corneal edema or thickened cornea (corneal hysteresis artifact leading to falsely high NCT readings).