Related Experiment Video
Updated: Feb 13, 2026
04:51
Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy
Published on: April 11, 2019
10.5K
[Surgical treatment for persistent pupillary membranes].
Ying Zhao1, Pingbao Wang1, Xiaobo Xia1
1Department of Ophthalmology, Xiangya Hospital, Central South University, Changsha 410008, China.
Summary
Surgical treatment for persistent pupillary membrane (PPM) effectively improves vision in most cases. Early intervention and post-operative amblyopia management are crucial for optimal outcomes in patients with congenital pupil residual membrane.
Area of Science:
- Ophthalmology
- Surgical Innovation
Background:
- Persistent pupillary membrane (PPM) can cause visual impairment.
- Surgical intervention for PPM is explored to improve visual outcomes.
Purpose of the Study:
- To evaluate the efficacy of surgical treatment for persistent pupillary membrane (PPM).
- To assess the impact of PPM resection on visual acuity.
Main Methods:
- Retrospective review of 12 patients (16 eyes) undergoing PPM resection.
- Analysis of medical records and postoperative follow-up data.
- Comparison of outcomes between simple PPM resection and combined cataract surgery.
Main Results:
- Visual acuity improved in 11 of 12 eyes after simple PPM resection.
- Visual acuity improved in 2 of 4 eyes after combined PPM resection and cataract surgery.
- One case experienced transiently high intraocular pressure post-surgery.
Conclusions:
- Surgical treatment is effective for congenital persistent pupillary membrane.
- Early surgical intervention for significant PPM is recommended.
- Postoperative amblyopia treatment is vital for maximizing visual recovery.
Related Concept Videos
01:16Introduction to Membrane Proteins
81.7K
The cell membrane, or plasma membrane, is an ever-changing landscape. It is described as a fluid mosaic where various macromolecules are embedded in the phospholipid bilayer. Among the macromolecules are proteins. The protein content varies across cell types. For example, mitochondrial inner membranes contain ~76% protein content, while myelin contains ~18% protein content. Individual cells contain many types of membrane proteins—red blood cells contain over 50—and different cell...
81.7K
01:54What are Membranes?
193.2K
A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and...
193.2K
01:24What are Membranes?
19.3K
A cell's plasma membrane demarcates the cell's borders and determines the nature of its interaction with the environment. Cells exclude certain substances, take in others, and excrete some others in controlled quantities. The plasma membrane must be flexible to allow certain cells, such as red and white blood cells, to change their shape while passing through narrow capillaries. These are the more obvious plasma membrane functions. In addition, the plasma membrane's surface carries...
19.3K
01:21The Resting Membrane Potential
143.3K
Overview
143.3K
01:23Membrane Fluidity
175.6K
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
175.6K
01:32Membrane Lipids
34.5K
Lipids are an essential component of all biological membranes. The average lipid content in mammalian membranes is 50%, though it can be as low as 20% in the inner mitochondrial membrane or as high as 80% in the myelin sheath present around the nerve cells.
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
Phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin are the most common phospholipids present in mammalian membranes. At physiological pH, phosphatidylserine is negatively charged, while the other three...
34.5K