The silicone hollow eye model was created as part of a research project focused on studying vitreous opacities, commonly known as floaters, within the human eye's vitreous body. This model can be filled with hydrogels to replicate the properties of the vitreous. It's realistic geometry mimics actual eyes, allowing for the placement of typical patient interfaces on the cornea and ensuring a matching refractive index.

Floaters can come in different sizes and shapes, and the degree of liquefaction can vary among individual patients. Consequently, the range of motion for floaters can vary from complete static positioning to free movement in a fluid-like viscosity. Due to the extensive movement possibilities of floaters and the limited availability of patient floater recordings, our primary focus was to establish an adjustable model that encompasses the entire range of motion, from complete static positioning to free movement within the vitreous body.

For the vitreous body model, we utilized the gel forming agent PNC400, which solidifies into a rigid gel with exceptional clarity when it reaches a water content of 99%. To produce the eye, we employed a 3D printing process to create two hemispheres. The inner surface of the mold was smoothed using epoxy resin and polishing techniques. Subsequently, we filled it with a two-component silicone that possesses high transparency, low viscosity, and a lengthy curing time. The hemispheres were then sealed together, and the entire mold was rotated along all axes for several hours, allowing the silicone to slowly cure against the mold walls.

Utilizing 3D printing as the manufacturing process enables us to construct the shape of the cornea freely. Depending on the specific geometry, we can adjust the refractive power of the silicone cornea to replicate that of the human cornea and lens. However, the model eye does not include a separate lens. The construction of the eye was based on precise measurements from the Navarro model eye, which defines distances, radii, and refractive indices with great accuracy.

It is important to note that the eye model is still undergoing development, and precise parameters are yet to be determined. Additionally, beyond its application in floater research, this model may have other potential uses, such as serving as a training model for various ophthalmic surgical techniques or aiding in research on imaging practices within the eye. The LZH continues to explore the possibilities and advancements in the field of the model eye.