Related Experiment Video
Updated: Jun 11, 2026

07:29
Three Different Protocols of Corneal Collagen Crosslinking in Keratoconus: Conventional, Accelerated and Iontophoresis
Published on: November 12, 2015
[Collagen cross-linking with riboflavin and UVA light]
A Hoyer1, E Spörl, L E Pillunat
1Augenklinik, Elblandklinikum Radebeul. Anne.Hoyer@elblandkliniken.de
Summary
Collagen cross-linking is an effective treatment for progressive keratoconus, stabilizing or improving vision in most patients. This minimally-invasive procedure offers significant clinical, economic, and psychosocial benefits.
Area of Science:
- Ophthalmology
- Corneal Surgery
- Biomaterials Science
Context:
- Progressive keratoconus is a degenerative corneal disease.
- Collagen cross-linking (CXL) has emerged as a standard therapy since 1998.
- Defining progression criteria is crucial for patient selection.
Purpose:
- To evaluate the efficacy and long-term outcomes of collagen cross-linking for progressive keratoconus.
- To assess changes in visual acuity and corneal topography after CXL.
- To identify potential benefits and side effects of the procedure.
Summary:
- The study analyzed 153 eyes of 111 patients with a minimum 12-month follow-up.
- Corneal ectasia decreased by 2.28 D in the first year post-CXL.
- Visual acuity improved or remained stable in 73% of patients within the first year, with sustained results over two years.
Impact:
- Collagen cross-linking demonstrates long-term stabilization and improvement in progressive keratoconus.
- The treatment offers significant clinical, economic, and psychosocial advantages.
- CXL is an outpatient, minimally-invasive, and cost-effective therapeutic option.
Related Concept Videos
Fibril-associated Collagen
Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
Type IV Collagen of Basal Lamina
Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can exist in...
A type IV collagen molecule has six alpha chains which can exist in...
Role of Skin in Vitamin D Synthesis
The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
Nucleotide Excision Repair
Overview
Mutations
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...

