Changes in ocular surface status after phacoemulsification in patients with senile cataract
Piyush Kohli1, Sudesh Kumar Arya2, Amit Raj2
1Department of Ophthalmology, Government Medical College and Hospital, Chandigarh, India. kohli119@gmail.com.
International Ophthalmology
|June 22, 2018
Summary
Phacoemulsification surgery causes temporary dry eye symptoms and signs, which typically improve within six weeks. Key risk factors include patient age and surgical factors like microscope light exposure and phacoemulsification time.
Area of Science:
- Ophthalmology
- Ocular Surface Disease
Background:
- Phacoemulsification is a common cataract surgery technique.
- Dry eye disease is a prevalent condition affecting the ocular surface.
Purpose of the Study:
- To assess post-operative dry eye signs and symptoms after phacoemulsification.
- To evaluate the impact on ocular surface status using impression cytology.
- To identify associated risk factors for dry eye development.
Main Methods:
- Prospective study of 50 patients undergoing phacoemulsification.
- Utilized dry eye indices: OSDI, Schirmer I test, TBUT, TMH, and staining.
- Assessed goblet cell density (GCD) via impression cytology.
Main Results:
- Temporary worsening of dry eye signs and symptoms observed post-surgery.
- Goblet cell density (GCD) decreased post-operatively.
- Risk factors identified: age, microscope light duration, effective phacoemulsification time.
Conclusions:
- Phacoemulsification leads to transient dry eye deterioration.
- Patients require counseling regarding the temporary nature of dry eye.
- Minimizing surgical light and ultrasound energy is recommended.
Related Concept Videos
01:26Marcia's Theory of Identity Status
1.7K
James Marcia's identity status model provides a framework for understanding how adolescents navigate identity formation through varying degrees of exploration and commitment. Marcia's model builds on Erik Erikson's theories of psychosocial development, focusing specifically on how adolescents reconcile individual aspirations with societal expectations. His model describes identity formation as a dynamic process where adolescents move between different states depending on their level...
1.7K
01:16Surface Tension and Surface Energy
3.3K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
3.3K
01:14Wood Surfacing
362
Wood surfacing is a critical finishing process designed to smoothen the wood surface, enhance its dimensional accuracy, and make handling safer. This process compensates for potential shrinkage during the seasoning phase by marginally increasing the wood dimensions before surfacing. It also helps correct some distortions that may occur as the wood dries.
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
The equipment used in the surfacing process is a plane equipped with rotating blades. This tool efficiently smoothens the wood surface and can...
362
01:21Cell-surface Signaling
54.6K
Hormones—or any molecule that binds to a receptor, known as a ligand—that are lipid-insoluble (water-soluble) are not able to diffuse across the cell membrane. In order to be able to affect a cell without entering it, these hormones bind to receptors on the cell membrane. When a first messenger, a hormone, binds to a receptor, a signal cascade is set off, causing second messengers, proteins inside the cell, to become activated, resulting in downstream effects.
54.6K
01:29Area of a Surface of Revolution
64
Surfaces of revolution are formed when a two-dimensional curve is rotated around an axis, producing a three-dimensional shape. This concept is used in engineering tasks like determining the surface area of a rocket nozzle, where precise calculations are critical for applying uniform heat-resistant coatings. When a curve is revolved about the x-axis, it sweeps out a continuous surface whose area must be calculated accurately to estimate material requirements.Approximating with Conical BandsTo...
64
01:16Equipotential Surfaces and Conductors
4.4K
For a conductor in which all charges are at rest, the conductor's surface is equipotential. The electric field is always perpendicular to equipotential surfaces. Therefore, in a conductor with static charges, the electric field just outside the conductor is always perpendicular to the conductor's surface. Any tangential component of the electric field will cause charges to move inside the conductor, which will violate the electrostatic nature of the system. In an electrostatic...
4.4K