UTF-4880A Universal trial frame, PD 48–80 mm
A fully adjustable universal trial frame: PD 48 to 80 mm (24 to 40 mm per eye), a Ø38 mm aperture for full-size trial lenses, four lens cells per eye, and adjustable nose pad, height and temple length. 180 × 95 × 62 mm and 77 g.
Delivery, packing and documents
What the UTF-4880A adjusts
Monocular PD
Each side moves separately, 24 to 40 mm, on a millimeter scale; 48 to 80 mm in total.
Four lens cells per eye
Three cells in front and one behind, with 360° rotation of the lens in the inner ring.
Axis scales
Marked every 5°, increasing anticlockwise: left 120°–0°–135°, right 45°–180°–60°.
Adjustable nose pad
Nose pad length 0 to 14 mm and angle 0° to 30°, with a knob for pupil height.
Adjustable temples
Temple length from 115 to 150 mm, adjusted with a knob on each side.
Full-size aperture
A Ø38 mm effective aperture for full-aperture trial lenses.
A closer look at the UTF-4880A
PD scale for each eye
Set the monocular PD from 24 to 40 mm for each eye, 48 to 80 mm in total, on scales marked every millimeter.
Axis scale and lens cells
Axis scales marked every 5°, a Ø38 mm aperture, and four lens cells per eye: three in front and one behind.
Boxed
Supplied in a foam-lined box that keeps the frame from knocking about in a drawer.
UTF-4880A in figures
Published specifications. Anything not listed here is confirmed in writing on your quotation, never estimated.
UTF-4880A
- PD range
- 48–80 mm binocular; 24–40 mm each eye; 1 mm scale
- Axis scale
- Left 120°–0°–135°, right 45°–180°–60°, anticlockwise, every 5°
- Effective aperture
- Ø38 mm
- Lens cells per eye
- 4 (3 front, 1 back)
- Lens rotation
- 360°
- Lens axis nonparallelism
- ≤ 2.5°
- Optical vs geometric center
- ≤ 0.5 mm
- Lens displacement from frame center
- ≤ 0.3 mm
- Nose pad
- Length 0–14 mm, angle 0°–30°
- Temple length
- 115–150 mm
- Dimensions
- 180 × 95 × 62 mm
- Net weight
- 77 g
Choosing and using a trial frame
How it works
A trial frame holds trial lenses in front of the patient’s eyes at a controlled distance and angle. Set the PD so each lens center sits in front of the pupil, set the height, and adjust the nose pad and temples so the frame sits level.
A trial frame suits patients who find a phoropter difficult: young children, older and low-vision patients, wheelchair users, and high prescriptions, because you can see the patient and set the vertex distance yourself. Put the strongest sphere in the back cell, closest to the eye, and record the vertex distance; for powers of ±5.00 D and above it should go on the prescription.
Trial frames are also used to let a patient try a new prescription in real conditions, walking or reading, before the glasses are made.
Check before you order
- PD range against your patients: 48 to 80 mm here.
- Aperture: Ø38 mm takes full-aperture trial lenses.
- Number of lens cells per eye: four here, three in front and one behind.
- Nose pad and temple adjustment for small and large faces.
Good practice
- Set each monocular PD before placing lenses.
- Level the frame with the height knob and nose pad.
- Put the strongest sphere in the back cell, then set the cylinder axis on the scale.
- Measure and record the vertex distance for prescriptions of ±5.00 D and above.
Care and maintenance
- Wipe the frame after each patient, especially the nose pad.
- Do not force the knobs past their stops.
- Store the frame in its box.
Background sources: Trial frame refraction: more than just “1 or 2?” (Cybersight, Orbis) · Essential course in dispensing, part 14 (Optician) · Jackson cross cylinder (StatPearls, NCBI Bookshelf)
Often ordered with the UTF-4880A
UTF-4880A questions
Which trial lenses fit the UTF-4880A?
Trial lenses with Ø38 mm rims, such as our TLC-266 sets and the TLC-232P; the effective aperture is Ø38 mm.
Can I set a different PD for each eye?
Yes. Each side moves separately, 24 to 40 mm.
How many lenses can I stack?
Four per eye: three in the front cells and one in the back cell.
Is it suitable for children?
The PD starts at 48 mm, and the nose pad and temples adjust. For very small faces, check the PD range against your patients.