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The Silhouette SPX Illusion Fullrim 1601 Eyeglasses bring together Austrian engineering and contemporary cat-eye styling in a prescription-ready frame that weighs almost nothing. Built from Silhouette's proprietary SPX®+ polymer composite, these full-rim frames deliver the comfort of a rimless design with the durability and lens security you need for daily wear.
SPX®+ Material: Lighter and Stronger Than Acetate
The 1601 is constructed from SPX®+, a polyamide-based material Silhouette developed in 1983 and has refined for over 40 years. It's twice as strong as conventional acetate, yet nearly 40% lighter—a combination that eliminates pressure points on the nose and behind the ears during all-day wear. The material is hypoallergenic, flexible enough to contour to your face, and maintains its shape without warping. Each frame is hand-dipped to achieve the gradient color effects you see in options like Tricolore Grape, Mint Gradient, and Smoky Blossom.
Unlike injection-molded acetate frames, SPX®+ uses composite molding technology that fuses different hardness levels in a single frame—softer material over the temples for comfort, harder material in the front for stability. The integrated screwless hinge design means fewer failure points and a cleaner, more modern look.
Cat-Eye Shape for Round and Oval Faces
The 1601 features a softly upswept cat-eye silhouette that flatters round, oval, and heart-shaped faces by adding lift and definition to the upper face. Available in two sizes—52mm and 54mm lens width—with a 15mm bridge and temple lengths of 130mm or 135mm, the frame accommodates a range of face widths. The full-rim construction provides maximum lens stability, making it compatible with single-vision, progressive, high-index, and photochromic lenses.
"I love these glasses and I get so many compliments when I am wearing them!" — CoolFrames customer review
Prescription-Ready and Fully Adjustable
These frames are prescription-ready and ship with demo lenses. The flexible temples and integrated nose pads can be professionally adjusted to ensure an ergonomic, personalized fit. All Silhouette frames are made in Austria under strict quality standards, with each pair passing 100 quality checks before shipping. The 1601 is available in 10 color options, from classic Havanna Tobacco and Black Lace to fashion-forward hues like Caribbean Blue and Lavender Violet.
Product Details
Product DetailsModel
SPX Illusion FullrimShape
Gender
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsColor Code
4010Color Description
violetFrame Color
Purple
Color Code
8510Color Description
creme
Color Code
6610Color Description
greyFrame Color
Gray
Color Code
3530Color Description
rose
Color Code
6610Color Description
greyFrame Color
Gray
Color Code
3530Color Description
rose
Color Code
9210Color Description
black
Color Code
4010Color Description
violetFrame Color
Purple
Color Code
8510Color Description
creme
Color Code
4030Color Description
violetFrame Color
Purple
Color Code
4030Color Description
violetFrame Color
Purple
Color Code
9210Color Description
black
Color Code
5110Color Description
Caribbean Blue
Color Code
5110Color Description
Caribbean Blue
Color Code
5810Color Description
greenFrame Color
Green
Color Code
4110Color Description
violetFrame Color
Purple
Color Code
9410Color Description
black
Color Code
4110Color Description
violetFrame Color
Purple
Color Code
5810Color Description
greenFrame Color
Green
Color Code
9410Color Description
black
Color Code
4660Color Description
blueFrame Color
Blue
Color Code
5530Color Description
greenFrame Color
Green
Color Code
5530Color Description
greenFrame Color
Green
Color Code
2630Color Description
orangeFrame Color
Orange
Color Code
4130Color Description
violetFrame Color
Purple
Color Code
2630Color Description
orangeFrame Color
Orange
Color Code
4130Color Description
violetFrame Color
Purple
Color Code
4660Color Description
blueFrame Color
Blue
Color Code
2530Color Description
orangeFrame Color
Orange
Color Code
3030Color Description
redFrame Color
Red
Size Details
Size DetailsSize
5215
Size
5415
Size
5415
Size
5215
Size
5215
Size
5415
Size
5215
Size
5415
Size
5215
Size
5415
Size
5215
Size
5415
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
130.00Size
5215
Bridge Width
15.00Temple Length
135.00Size
5415
Bridge Width
15.00Temple Length
130.00Size
5215
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Frequently Asked Questions
What is SPX®+ material and how does it compare to acetate?
SPX®+ is Silhouette's proprietary polyamide polymer composite, developed in 1983. It's twice as strong as conventional acetate yet nearly 40% lighter, making it ideal for all-day wear without pressure points. The material is hypoallergenic, highly flexible, and resistant to warping. Unlike acetate, SPX®+ is processed using injection molding for greater precision and allows for composite construction with varying hardness levels in different frame areas.
Are the Silhouette SPX Illusion 1601 frames prescription-ready?
Yes, the SPX Illusion 1601 frames are fully prescription-ready and compatible with single-vision, progressive, high-index, photochromic (Transitions), and blue-light filtering lenses. The full-rim construction provides excellent lens stability and security. These frames ship with demo lenses that will be replaced with your prescription lenses during the ordering process.
What face shapes work best with cat-eye frames like the 1601?
The SPX Illusion 1601's cat-eye shape is particularly flattering for round, oval, and heart-shaped faces because the upswept outer corners add lift and angular definition to soften rounded features. The frame is available in two lens widths (52mm and 54mm) to accommodate different face sizes, and the adjustable temples and nose pads allow for a customized fit.
How much do the SPX Illusion 1601 frames weigh?
While Silhouette doesn't publish exact weights for the SPX Illusion 1601, frames made from SPX®+ material are approximately 40% lighter than equivalent acetate frames. The material's extreme lightness is a signature feature of all Silhouette eyewear, designed to eliminate pressure points and provide all-day comfort without the need for constant adjustment.
Can the SPX Illusion 1601 frames be adjusted for a better fit?
Yes, the SPX Illusion 1601 features flexible temples and integrated nose pads that can be professionally adjusted for a personalized, ergonomic fit. The SPX®+ material maintains its shape despite extreme flexibility, so adjustments hold securely. Silhouette recommends visiting an authorized optician for adjustments to ensure proper fit and comfort.
What sizes are available for the Silhouette 1601 frames?
The SPX Illusion 1601 is available in two sizes: 52-15-130 (52mm lens width, 15mm bridge, 130mm temple) and 54-15-135 (54mm lens width, 15mm bridge, 135mm temple). The 52mm size works well for small to medium faces, while the 54mm accommodates medium to larger face widths. Both sizes feature the same cat-eye silhouette and color options.
Compare With Similar Frames
How the Silhouette SPX Illusion Fullrim 1601 Eyeglasses stacks up against the closest alternatives we carry.
- Rectangular shape suits square and oval faces
- More unisex styling
- Same lightweight SPX®+ material and screwless hinge technology
- Same SPX®+ lightweight construction
- Alternative frame shape for different face types
- Identical material benefits and hypoallergenic properties
Read the full comparison
Silhouette SPX Illusion 1601 vs. Similar Models
If you're drawn to the SPX Illusion 1601's lightweight SPX®+ construction but want to explore other shapes in the same collection, the SPX Illusion 1604 and 1617 offer compelling alternatives.
The 1604 features a rectangular frame shape that works particularly well for square and oval faces, offering a more unisex aesthetic compared to the 1601's feminine cat-eye. Both models share the same SPX®+ material, screwless hinge design, and hand-dipped color treatments, but the 1604's straighter lines create a more professional, understated look. If you prefer angular frames or need a style that transitions easily between work and casual settings, the 1604 is worth considering.
The 1617 provides yet another shape option within the SPX Illusion family, maintaining all the material benefits—40% lighter than acetate, hypoallergenic, and flexible—while offering a different silhouette. All three models are prescription-ready, compatible with progressive lenses, and built to the same Austrian quality standards.
Why choose the 1601? If you specifically want a cat-eye frame that adds lift and definition to round or oval faces, the 1601's upswept corners deliver that effect better than the more angular 1604 or alternative 1617 shapes. The 1601 also offers the widest range of fashion-forward gradient colors in the collection, making it the best choice for customers who want both the SPX®+ material benefits and a distinctly feminine, compliment-worthy style.
At a Glance
Silhouette SPX Illusion Fullrim 1604 Eyeglasses
Pros:
- Rectangular shape suits square and oval faces
- More unisex styling
- Same lightweight SPX®+ material and screwless hinge technology
Cons:
- Less feminine styling than the 1601's cat-eye
- May not provide the same face-lifting effect as the upswept cat-eye corners
Silhouette SPX Illusion 1617 Eyeglasses
Pros:
- Same SPX®+ lightweight construction
- Alternative frame shape for different face types
- Identical material benefits and hypoallergenic properties
Cons:
- Different silhouette may not suit those specifically seeking cat-eye styling
- Shape variation means different face shape compatibility