What Is Dry Eyes About?

What is Dry Eye Reference & Diagnostics 干眼症（DED）全景临床指南与诊疗

Dry Eye Disease (DED) is a complex, multifactorial ocular surface disorder characterized by a loss of tear film homeostasis. Rather than a simple lack of tears, DED involves intricate interactions between evaporative instability, aqueous deficiency, inflammation, and cellular stress. By integrating precision diagnostic metrics—such as NIBUT, tear osmolarity, and meibography—our Dry Eye Smart Map framework categorizes your specific subtype to transition treatment from temporary symptom masking to targeted, long-term therapeutic relief.

干眼症（DED）是一种以泪膜稳态失衡为特征的复合型慢性眼表疾病。 干眼症绝非单纯的“缺水”，而是涉及泪液蒸发过快、水液分泌不足、眼表炎症及细胞损伤的复杂病理过程。通过整合高阶精准诊断指标（如非侵入性泪膜破裂时间 NIBUT、泪液渗透压及睑板腺成像），干眼症智慧图谱系统能精准锁定您的具体病理亚型，将治疗方案从“暂时性补水”提升为“针对性根源治疗”。

1. Pathophysiology & Tear Layer Breakdown 干眼症四大病理机制与泪膜受损分层

Evaporative Dry Eye (EDE) 蒸发过强型干眼（受损：外层脂质层）

Primary Mechanism: Accelerated tear evaporation into the ambient air.
Core Pathology: Meibomian Gland Dysfunction (MGD), ductal blockage, and lipid layer deficiency lead to premature tear breakdown.

核心机制： 泪液向空气中过度过快蒸发。
核心病理： 睑板腺功能障碍（MGD）、腺管堵塞及脂质层缺失，导致泪膜极易提前破裂。

Aqueous Deficient Dry Eye (ADDE) 水液缺乏型干眼（受损：中层水液层）

Primary Mechanism: Insufficient volume output from the main and accessory lacrimal glands.
Core Pathology: Lacrimal gland impairment, ductal atrophy, or neural reflex disruption reduces total tear volume.

核心机制： 主泪腺及副泪腺的液体分泌量严重不足。
核心病理： 泪腺功能受损、泪管萎缩或神经反射信号中断，导致基础泪液分泌量骤降。

Mucin Deficient Dry Eye 黏蛋白缺乏型干眼（受损：内层黏蛋白层）

Primary Mechanism: Inability of tears to adhere properly to the hydrophobic corneal epithelium.
Core Pathology: Conjunctival goblet cell damage caused by severe mechanical, chemical, or autoimmune trauma.

核心机制： 泪液无法平整、牢固地附着于疏水性的角膜上皮表面。
核心病理： 由化学烧伤、Stevens-Johnson 综合征或严重机械损伤导致的结膜杯状细胞破坏。

Mixed Type Dry Eye 混合型干眼（受损：多层联合受损）

Primary Mechanism: Simultaneous presence of aqueous volume deficit and rapid surface evaporation.
Core Pathology: Concurrent MGD and lacrimal insufficiency; represents the vast majority of chronic clinical cases.

核心机制： 基础水液分泌不足与表层油脂缺乏过快蒸发同时并存。
核心病理： 睑板腺功能障碍与泪腺分泌不足叠加，占临床慢性干眼病例的绝大多数。

2. Key Diagnostic 临床诊断指标速查

Diagnostic Test 诊断项目	Normal Range 正常临床范围	Dry Eye Threshold 干眼诊断临界值	Primary Clinical Indication 主要临床评估意义
TBUT / NIBUT 泪膜破裂时间	> 10 seconds > 10 秒	< 5 seconds < 5 秒	Evaluates tear film stability and lipid layer integrity (EDE / MGD). 评估泪膜稳定性与脂质层完整性（蒸发型/MGD）。
Schirmer I Test 泪液分泌试验（无麻醉）	> 10 mm / 5 min > 10 毫米 / 5 分钟	< 5 mm / 5 min < 5 毫米 / 5 分钟	Directly measures total aqueous tear volume production (ADDE). 直接测量基础水液泪腺分泌总量（水液缺乏型）。
Tear Osmolarity 泪液渗透压	< 300 mOsm/L < 300 mOsm/L	> 308 mOsm/L > 308 mOsm/L (或双眼差>8)	Measures ocular surface hyperosmolar stress and tissue inflammation. 评估眼表高渗应激状态与高炎症风险。
Ocular Surface Staining 角结膜染色评估	Grade 0 (No staining) 0 级（无着色染色）	Moderate to severe erosions 中度至重度点状上皮剥脱	Assesses physical micro-damage to corneal and conjunctival epithelial cells. 评估角膜及结膜上皮细胞的物理性微观损伤程度。

Patient Q&A: Part 1 患者常见问答：第一部分

"Why do my eyes water uncontrollably when I am outside, but feel bone-dry and burning when I work at my computer?" “为什么我在室外时眼睛会频繁流泪，但在电脑前工作时却觉得干涩、灼痛？”

This condition is known as "paradoxical reflex tearing" and is a classic symptom of Evaporative Dry Eye (EDE) caused by Meibomian Gland Dysfunction (MGD).

When you work at a computer, your blink rate drops by roughly 60%, and your blinks become incomplete. Without enough protective oils spreading over your eye, your baseline tears evaporate almost instantly into dry office air. This leaves your corneal nerves completely exposed, causing severe burning and irritation. When you step outside into wind or bright light, your raw, exposed corneal nerves send a emergency panic signal to your nervous system. Your lacrimal gland responds by flooding your eye with a surge of watery tears. However, because these reflex tears lack protective lipids, they flush off immediately without clinging to your eye, leaving you right back where you started: dry, burning, and tearing uncontrollably.

这种现象在医学上被称为“反射性代偿流泪”，是典型的由于睑板腺功能障碍（MGD）引起的“蒸发过强型干眼”表现。

当您在电脑前工作时，眨眼频率会骤降约 60%，且多为不完全眨眼。由于缺少足够的油脂平铺在眼表，您的基础泪水在干燥的办公室空气中会瞬间蒸发，导致角膜神经直接暴露在外，引发强烈的灼痛与异物感。而当您走到室外受到冷风或强光刺激时，受损暴露的角膜神经会向大脑发出紧急求救信号，主泪腺随之爆发性分泌大量水样泪液。然而，这种反射性泪水完全不含保护性油脂，流过眼表后会迅速滑落，根本无法滋润眼球，从而陷入“越流泪越干涩灼痛”的恶性循环。

Patient Q&A: Part 2 患者常见问答：第二部分

"How does the Dry Eye Smart Map determine whether I need thermal treatments like LipiFlow/IPL or systemic medications?" “干眼智慧图谱是如何确定我需要 LipiFlow/IPL 热脉冲光治疗，还是需要口服药物或泪小点塞的？”

The Smart Map differentiates Evaporative Dry Eye (Type 1) from Aqueous Deficient Dry Eye (Type 2) by cross-referencing your physical diagnostic metrics against clinical threshold standards.

If your TBUT is <5 seconds and meibography reveals gland blockages while your Schirmer test is normal, you have pure Evaporative Dry Eye (MGD). Your targeted protocol will focus on 1st/2nd line thermal therapies: 40°C warm compresses, lid margin hygiene, low-dose oral doxycycline, and in-office Thermal Pulsation (LipiFlow/iLux) or Intense Pulsed Light (IPL) to unblock solidified oil glands.

Conversely, if your Schirmer test is <5 mm/5 min and your tear osmolarity is elevated (>308 mOsm/L), you have Aqueous Deficient Dry Eye. Treatments will shift to water retention strategies: preservative-free hyaluronic acid, secretagogues (Diquafosol), topical Cyclosporine to suppress immune inflammation, and Punctal Plugs to physically block tear drainage and preserve your natural tear pool.

智慧图谱通过将您的物理诊断指标与临床临界值标准进行交叉比对，精准区分“蒸发过强型（1型）”与“水液缺乏型（2型）”干眼。

如果您的 TBUT 破裂时间 <5 秒，红外线成像显示睑板腺堵塞，而泪液分泌试验（Schirmer）正常，说明您属于纯蒸发型干眼（MGD）。诊疗重点将集中于疏通油脂：包括 40°C 恒温热敷、睑缘清洁、口服低剂量多西环素，以及临床 Thermal Pulsation（LipiFlow/iLux 热脉冲）或 IPL 强脉冲光治疗，以融化并排出固化的油脂。

反之，若您的 Schirmer 测定 <5 毫米/5分钟 且泪液渗透压升高（>308 mOsm/L），则表明您属于水液缺乏型干眼。治疗方案将转向锁水与抗炎：使用无防腐剂透明质酸钠、促泪液分泌剂（地夸磷索）、环孢素抗炎眼药水，以及植入 Punctal Plugs（泪小点栓塞），从物理上封堵泪道、留存您宝贵的自有泪液。

Patient Q&A: Part 3 患者常见问答：第三部分

" Will taking a break from screen time or using artificial tears permanently cure my dry eyes?" “减少看屏幕的时间或滴人工泪液，能彻底根治我的干眼症吗？”

n short: No, but they are essential tools for managing symptoms and preventing long-term corneal damage.

Here is why dry eye is usually a chronic condition that requires ongoing care:

Dry Eye is a Chronic Condition: For most people, dry eye is not a temporary infection, but a progressive, ongoing state—much like having dry skin. Environmental adjustments and eye drops help control flare-ups, but they don't change your underlying biology or natural tear production capacity.
Artificial Tears Are a Temporary Shield: Lubricating drops act like a lotion. They replace moisture on the surface for 15 to 30 minutes, but they do not unblock clogged meibomian (oil) glands or repair lacrimal gland function.
Screen Breaks Prevent Worsening, Not the Cause: Pausing screen time stops your blink rate from dropping while you rest, but it cannot restore lost meibomian glands or reverse hormonal changes and aging.

简短的回答是：不能根治，但它们是控制症状、保护角膜免受长期损伤的关键手段。

为什么干眼症通常需要长期管理，而无法“一劳永逸”？

干眼症是一种慢性病： 对大多数人而言，干眼症并非短暂的感染，而是一个持续发展的慢性状态——类似于干性皮肤。改变环境和使用滴眼液能缓解症状，但无法从根本上改变眼腺体的自然衰退或体质。
人工泪液只是“暂时的保护盾”： 润滑滴眼液就像身体乳液，只能在眼球表面提供 15 到 30 分钟的保湿作用，并不能疏通阻塞的睑板腺（油脂腺），也无法修复泪腺功能。
减少看屏幕只能“防止恶化”： 休息屏幕能让眨眼频率恢复正常、减少泪水蒸发，但无法恢复已经萎缩的睑板腺，也无法逆转激素变化或自然衰老。

Jul 08,2026