患者的色彩视觉和对比度灵敏度的变化主要角度闭合和主要角度闭合光眼
Hennaav Kaur Dhillon1, Parul Ichhpujani1, Uday Pratap Singh Parmar1
1Department of Ophthalmology, Government Medical College, and Hospital, Chandigarh, India.
Oman journal of ophthalmology
|November 13, 2025
概括
在患有主角闭眼 (PAC) 和主角闭眼眼 (PACG) 的患者中,色彩视觉和对比度敏感性受损. 这些视觉参数的早期查对于及时干预至关重要.
科学领域:
- 眼科医生 眼科 眼科
- 玻璃眼研究研究 玻璃眼研究
- 视觉神经科学是一种神经科学.
背景情况:
- 主要角闭眼 (PACG) 和主角闭眼 (PAC) 是导致视力丧失的重要原因.
- 了解这些条件下的早期功能变化对于有效管理至关重要.
研究的目的:
- 在患有PACG和PAC的患者中评估色彩视觉 (CV) 和对比敏感性 (CS).
- 为了将这些视觉参数与年龄匹配的对照进行比较.
- 为了将视觉变化与光学连贯断层扫描 (OCT) 视网膜神经纤维层 (RNFL) 数据相关联.
主要方法:
- 使用D-15和石原测试评估颜色视力.
- 用Spaeth Richman对比感测试 (SPARCS) 和Pelli Robson测试来测量对比度的敏感性.
- 在患者和对照组中进行的OCT RNFL和Humphrey视觉现场测试.
主要成果:
- 与对照组相比,在PACG和PAC两组中都观察到显著的色彩视觉缺陷,特别是质子和三.
- 在PACG和PAC两组中,大量患者的对比度敏感性降低.
- 在PACG和PAC组之间没有发现中央和外围CS的统计学上显著差异.
结论:
- 在色彩视觉和对比度敏感度的功能视觉缺陷甚至发生在初级角度闭合的早期阶段.
- 建议对这些视觉参数进行定期查,以早期检测和管理PAC和PACG.
相关概念视频
01:28Angle Closure Glaucoma: Treatment
1.1K
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
1.1K
01:25Glaucoma: Overview
1.2K
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
1.2K
01:22Photoreceptors and Visual Pathways
8.7K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
8.7K
01:27Open Angle Glaucoma: Treatment
940
In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Drugs such as carbonic anhydrase inhibitors, α2- and...
940
01:24Color Vision
1.3K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.3K
01:20Anatomy of the Eyeball
9.4K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
9.4K