How Fundus Imaging Works & How Equipment Leasing Save You Time & Money
Excedr can source virtually all instrument types and accommodate any brand preferences you might have. Request a fundus camera estimate today and see how leasing can discount your retinal imaging instrument’s price.
All equipment brands/models are available
The Advantages of Excedr’s Fundus Camera Leasing Program:
- Eliminates the upfront cost of purchasing equipment by spreading its cost over time
- Minimizes equipment downtime with included complete repair coverage and preventive maintenance
- Takes advantage of potentially 100% tax deductible* payments, providing you significant cash-savings
- Expedites the administrative work needed for instrument procurement and logistics
- Conserves working capital, enabling you to reinvest in your core business and operations (staffing, inventory, marketing/sales, etc.)
- Accommodates all manufacturer and model preferences
*Please consult your tax advisor to determine the full tax implications of leasing equipment.
Retinal imaging and ophthalmic photography are essential parts of establishing a person’s overall ocular health and monitoring it for any changes.
A fundus camera, or retinal camera, is one such imaging device that can provide ophthalmologists and optometrists with the ability to diagnose and treat retinal disease by generating high-resolution images of the interior surface of the eye, including the retina, retinal vasculature, macula, posterior pole, and optic disc, which together make up the fundus.
Fundus photographs are captured by simultaneously illuminating and imaging the retina.
This process provides eye care professionals with valuable insight into the health of their patients, and helps them identify and track retinal pathologies, such as diabetic retinopathy, retinal tear, macular edema, and macular degeneration, as well as other eye abnormalities or diseases, including glaucoma, optic atrophy, and cancer early enough that treatment can be provided before the disease or abnormality progresses further.
Many systems now offer wide-field and ultra wide-field retinal imaging capabilities, which, upon being introduced, have showed us that signs of disease are often on the far periphery of the retina.
Historically, fundus photography is well known for its ability to generate detailed 2D or 3D images of the retina. Since its introduction, the camera has used the retina’s own reflective properties to accomplish imaging, relying on the pupil as both the entrance and exit of the device’s light waves to create an illuminated image.
Depending on the equipment, this process can be either contact- or non-contact-based. Furthermore, pupil dilation is required when using more traditional, mydriatic equipment.
In contrast, non-mydriatic fundus cameras offers a non-invasive and non-contact method for ophthalmologists. These devices do not require pupil dilation, and provide the patient with more comfort, as dilation can cause sensitivity in the eyes and blurred vision.
However, in both contact and non-contact systems, the patient’s fundus is illuminated by forming a ring of light on the patient’s cornea, around a central area reserved for observation known as the corneal window.
Additionally, different imaging modes can be performed using fundus cameras, including both color and monochromatic photography. Filters applied to the camera system can be used to perform fluorescein angiography, indocyanine green angiography, and fundus autofluorescence.
Fundus Imaging System Modes, Benefits, & Price
Fundus cameras and imaging systems are workhorses of the ophthalmology clinic. They operate using a variety of techniques and provide fundus photographs that can detect and monitor retinal pathologies and etiologies.
In many cases, they can catch eye disease before it has significantly progressed, and enable eye care professionals to provide early treatment of the disease.
Fundus angiography (FA), which may also be referred to as fundus fluorescein angiography (FFA), is used to examine the circulation of the retina by using a fluorescent dye.
This examination provides a quantitative understanding of the blood circulation pattern present in the eye. Achieved using sodium fluorescein that is injected into the bloodstream, the retina is illuminated using a blue light at wavelengths of 490 nm (nanometers) that causes the dye to emit a green fluorescent light which highlights the blood vessels in the back of the eye.
A photograph is then taken to obtain an angiogram, which can help determine treatment if an eye disorder is present. Blood flow to the retina and optic nerve is used to monitor the state of a patient’s ocular health, as blood flow will remain constant over a range of fluctuating systemic or intraocular pressure.
Despite fluctuating levels of metabolic activity, the circulation within the eye will remain constant, similar to cerebral circulation. However, these responses can change due to disease. That is why FA is an important technique used to observe the course of a disease and to monitor treatment results.
Indocyanine Green Angiography
Indocyanine green angiography, or ICG, is used to obtain an angiogram of the choroid, which is deeper than the retina, and consists of a layer of blood vessels and connective tissues between the sclera, the white of the eye, and the retina.
Its job is to supply needed nutrients to the inner segment of the eye. ICG is similar to FA, but utilizes a dye called indocyanine green, instead of sodium fluorescein. Indocyanine green is injected intravenously in order to reach the choroid and retinal circulation, and fluoresce when exposed to infrared light, highlighting the choroidal vessels present in the eye.
Specifically used to observe the choroid, this technique may also be referred to as choroid angiography. ICG and FA are both used to diagnose and monitor a range of diseases that may not be detectable during a regular eye examination.
These diseases can include diabetic retinopathy, macular degeneration, and retinal vein occlusions.
Fundus autofluorescence, also known as FAF, is a non-invasive technique that detects fluorophores, a fluorescent chemical compound.
To produce autofluorescence, the fluorophore absorbs a photon of the excitation wavelength, in turn elevating the energy state of an electron. The electron dispels some of this energy through a series of molecular collisions, emitting a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents in the form of light at a lower wavelength and energy as it transitions back to a ground state.
These emissions of light are collected, and form a map reflecting the distribution of lipofuscin, which is a dominant fluorophore found in the RPE, or retinal pigment epithelium, a pigmented layer of cells found next to the retina that serves as a filter between light-sensitive photoreceptors of the retina and blood vessels of the choroid found below.
Some of RPE’s role is to absorb light, protect against photooxidation, as well as provide nutrients, ions, and water.
FAF typically relies on blue-light excitation, but may use other types of wavelengths in order to detect additional fluorophores. This technique’s value lies in its ability to characterize, diagnose, and monitor retinal diseases and disorders.
Hybrid fundus cameras can utilize both mydriatic and non-mydriatic features, and are capable of capturing color photographs, as well as fundus fluorescence and angiography.
This makes hybrid fundus cameras incredibly useful for any practice that performs a high-volume of color fundus photos, but often requires an angiogram in between.
Fundus & Retinal Camera Leases to Fit Every Need
Acquiring new equipment can prove difficult, specifically when burdensome upfront costs are involved. However, It is critical for any practice to have the proper retinal imaging devices in order to operate efficiently and provide quality treatment through fundus and retinal photography.
While the direct ophthalmoscope revolutionized eye care when it was first introduced, it is not nearly as effective a diagnostic tool as it once was considered to be, due in large to its inability to spot signs of retinal pathologies and other eye diseases. Fundus cameras have proven to be an excellent alternative to early screening of eye disease. However, they are also quite expensive.
If you’re looking for an alternative to buying a new or refurbished fundus camera system, we’re here to help. Excedr’s leasing program is a flexible and affordable alternative to purchasing ophthalmic equipment outright.
Contact us today to learn more about how you can lease your next fundus camera. Additionally, if your practice needs anterior segment photography solutions, such as slit lamp or optical coherence tomography (OCT) leases, we can help with that as well. We’re able to source virtually any equipment type and can accommodate your brand preferences.
This off-balance sheet financing structure provides three options at the end of the term. The lessee has the option to return the equipment to the lessor, renew at a discounted rate, or purchase the instrument for the fair market value. Monthly payments are also 100% tax deductible which yields additional monetary savings.
If you recently bought equipment, Excedr can offer you cash for your device and convert your purchase into a long-term rental. This is called a sale-leaseback. If you’ve paid for equipment within the last ninety days, we can help you recoup your investment and allow you to make low monthly payments. This also frees up money in your budget rather than tying it down to a fixed asset.
Fundus Camera Manufacturers & Models on the Market
TRC-NW8F Myd/Non-Myd Imaging System, TRC-NW8 High Resolution Non-Myd System, TRC-NW400 Non-Myd System, TRC-NW8F Plus, TRC NW8, TRC-NW8F, TRC-50DX, TRC-NW400
ZEISS CIRRUS photo, CIRRUS photo 600, CIRRUS photo 800, CLARUS 500, CLARUS 700, VISUSCOUT 100, RESIGHT 500, RESIGHT 700
CR-2, CR-2 AF, CR-2 PLUS AF, CX-1
Nonmyd AF, Nonmyd WX3D
DRS plus, COMPASS, EIDON, EIDON AF, EIDON FA, DRS
3nethra classic, 3nethra neo, 3nethra flora
Guardion Health Sciences:
SK-650A Non-Mydriatic Retinal Camera
AFC-330 Automated Fundus Camera