Fresnel prism foil (press-on)

Prisma foil (press on prism foil) from Fresnel for orthoptic diagnostics and therapy. Especially for pre-operative prism compensation and medium-term application at unstable angles. The adhesive foil is statically adhesive and can be cut to size.

The self-adhesive prism foils are particularly practical and easy use. The foils can be applied quickly and easily to the lens and ensure the correct prism compensation.

Order press-on prism foil

• Self-adhesive prism sheets for preoperative or medium-term prism compensation
• Available strenghts: 1 to 35 cm / m pdpt
• Content: 1 slide with instructions
• Material: high-quality plastic
• Size: 67 x 67 mm

The self-adhesive prism foils are optimally applicable as a temporary solution until the corrective operation. They are also suitable for intermediate use in general conditions (such as diabetes). The high-quality plastic ensures excellent image quality.

How long a prism is needed depends upon your individual needs and your eye condition. Sometimes a prism is needed for several months, but the strength of it changes as your eye condition stabilises.

Most common reasons for using a foil

There are many reasons for using a fresnel prism. Your orthoptist will discuss with you the reason why you have been advised to use one. The most common reasons are to:

• investigate whether your brain has the potential to use your two eyes together as a pair
• stop double vision (diplopia)
• use alongside eye exercises which you have been given by your orthoptist
• predict the outcome of squint surgery.

Advantages prism foil

• Relieves double vision
• Easy to (keep) clean
• It is easy to remove the foil after use
• Easy to change prism strength as your eye condition changes

And disadvantages

• Prisms creates a natural blurry image, because of the lines that are on the plastic prism.
•  They have to be fitted onto a glasses lens. If you do not need glasses to correct your eyesight, a pair can be made up with plain glass.

Available strengths

The Fresnel prism foil is available in the following strengths Δ: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 17.5, 20, 25, 30 and 35 Δ

Click here for instructions.