How Does Photobiomodulation Work? Understanding the Science Behind Valeda® Therapy for Dry AMD

The Role of Light in Supporting Retinal Cell Health

The retina is one of the most energy-demanding tissues in the human body. Every second, millions of retinal cells work together to capture light, process visual information, and maintain the delicate biological systems required for sight.

With ageing and conditions such as dry age-related macular degeneration (AMD), retinal cells—particularly the retinal pigment epithelium (RPE) and photoreceptors—can experience increasing metabolic stress. Over time, this may contribute to changes in retinal function and visual performance.

A developing area of retinal medicine called photobiomodulation (PBM) explores how specific wavelengths of light may influence cellular processes and support retinal health.

The Valeda® Light Delivery System represents an innovative approach using controlled light therapy to support cellular function in carefully selected patients with dry AMD.

What Is Photobiomodulation?

Photobiomodulation is a process in which cells respond to exposure to specific wavelengths of light.

Unlike ultraviolet light, which can cause tissue damage, PBM uses controlled levels of visible and near-infrared light to stimulate natural cellular pathways. The aim is not to heat or damage tissue, but to encourage beneficial biological responses.

Valeda uses a combination of:

·       590 nm yellow light

·       660 nm red light

·       850 nm near-infrared light

These wavelengths are designed to interact with cellular structures involved in energy production and regulation within retinal tissues.

The Mitochondrial Connection: Supporting Cellular Energy

One of the key proposed mechanisms of photobiomodulation involves the mitochondria—the structures responsible for producing energy inside cells.

Retinal cells have exceptionally high energy demands. Photoreceptors and retinal pigment epithelial cells rely on healthy mitochondrial function to maintain normal vision.

PBM is thought to stimulate activity within the mitochondrial respiratory pathway, particularly through interaction with cytochrome c oxidase, an important component involved in cellular energy production.

Potential effects may include:

·       Supporting ATP (cellular energy) production

·       Improving mitochondrial efficiency

·       Helping retinal cells respond better to metabolic stress

By supporting the energy systems of retinal cells, PBM aims to create a healthier environment for cells that are essential for vision.

Reducing Oxidative Stress

The retina is naturally vulnerable to oxidative stress because of its high oxygen requirements and constant exposure to light.

When oxidative stress becomes excessive, it can contribute to cellular dysfunction and ageing-related retinal changes.

Research into PBM suggests it may help by:

·       Supporting the body’s natural antioxidant responses

·       Reducing harmful cellular stress signals

·       Improving cellular resilience

This may help protect retinal cells from some of the challenges associated with ageing.

Modulating Inflammation Within the Retina

Low-level chronic inflammation is thought to play a role in age-related retinal changes.

PBM has been investigated for its ability to influence inflammatory pathways and may help create a more balanced cellular environment by:

·       Reducing excessive inflammatory signalling

·       Supporting healthier cellular communication

·       Promoting retinal tissue stability

Supporting Retinal Pigment Epithelium Function

The retinal pigment epithelium (RPE) is essential for maintaining photoreceptor health. It helps nourish retinal cells, remove waste products, and maintain the specialised environment required for vision.

In dry AMD, RPE dysfunction is an important part of disease progression.

By supporting cellular metabolism and function, photobiomodulation may help maintain the activity of remaining retinal cells.

What Does This Mean for Patients With Dry AMD?

Photobiomodulation is not a cure for AMD and cannot restore retinal cells that have already been permanently damaged.

The aim of Valeda therapy is to support the function of existing retinal cells and improve the cellular environment of the macula.

Clinical studies have shown encouraging results in selected patients with dry AMD, and research continues to understand:

·       Which patients are most likely to benefit

·       The ideal timing and treatment schedule

·       The long-term role of PBM in retinal care

Expert Guidance From Mr. Kumar

Understanding whether photobiomodulation may be suitable for you requires careful assessment of your individual retinal health.

Mr. Kumar can answer your questions about Valeda therapy, explain how photobiomodulation works, and help you understand whether this innovative treatment approach may be appropriate for your eyes.

Through detailed retinal examination and personalised discussion, Mr. Kumar can assess factors such as your AMD stage, retinal imaging findings, and visual needs before advising whether Valeda may be a suitable option.

Every patient’s eyes are different, and the decision to consider photobiomodulation should always be based on expert clinical evaluation.

The Future of Light-Based Retinal Medicine

Photobiomodulation represents an exciting development in retinal care, combining advances in light science, cellular biology, and ophthalmology.

By targeting processes such as mitochondrial function, oxidative stress, and cellular regulation, PBM offers a new approach focused on supporting retinal health alongside established AMD monitoring and management.

If you have dry AMD and would like to understand more about Valeda photobiomodulation therapy, Mr. Kumar and his team are available to answer your questions and help determine whether this treatment could be beneficial for you.

Conclusion

Photobiomodulation works by using carefully controlled light energy to influence biological activity within retinal cells.

As research continues, Valeda therapy may become an important part of personalised care for suitable patients with dry AMD, offering a new way to support retinal function and help protect vision.