Display Screen Equipment Assessment Explained

If you spend a significant part of your working day in front of a screen — laptop, desktop, tablet, or even a smartphone used for prolonged work — then display screen equipment (DSE) rules almost certainly apply to you or your workers. Here is a plain-English explanation of what a DSE assessment actually involves and what the law requires.

What Is Display Screen Equipment?

DSE is any alphanumeric or graphic display screen, regardless of the display process involved. In practice that means desktop monitors, laptops, tablets, and similar devices used for work. The rules do not normally cover equipment used only occasionally or in a private vehicle display, but if screen use is a regular and significant part of someone's job, the regulations apply.

The Legal Basis

The Health and Safety (Display Screen Equipment) Regulations 1992 (as amended) set out the specific duties. These sit alongside the general duty to assess risks under Regulation 3 of the Management of Health and Safety at Work Regulations 1999, which requires employers to carry out a suitable and sufficient risk assessment for all work activities.

The DSE Regulations apply to "users" — workers who habitually use DSE as a significant part of their normal work. The HSE's longstanding guidance treats this as roughly one hour or more of continuous or near-continuous screen use per day, though the test is about habitual use rather than a rigid time threshold. Self-employed people who are DSE users also have duties under the Regulations.

What a DSE Assessment Must Cover

A DSE assessment is not a tick-box exercise. It should identify risks arising from the workstation as a whole and lead to practical controls. The main areas to examine are:

• The display screen — brightness, contrast, glare, flicker, character size, image stability
• The keyboard and input devices — adjustability, spacing, usability, wrist support
• The work surface and desk — adequate size, stable, glare-free surface, legroom
• The chair — adjustable seat height, backrest height and tilt, footrest if required
• The environment — lighting (natural and artificial), reflections, noise, heat, humidity
• The software and task design — does software suit the task? Are breaks or changes of activity built in?
• The user themselves — any specific health conditions or needs, such as visual impairments or musculoskeletal issues, must be factored in

A useful structure is to work through each element systematically, record what you find, and note any action required and by whom.

Who Can Carry Out the Assessment?

The regulations do not specify a formal qualification. The assessor must be competent — meaning they have sufficient knowledge, training, and experience to identify the risks correctly and judge appropriate controls. Many organisations train line managers or the workers themselves to carry out self-assessments using a structured checklist, with a more experienced reviewer signing off the result. For complex cases (for example, a worker with a pre-existing musculoskeletal condition), an ergonomist or occupational health adviser may be appropriate.

Hierarchy of Controls

Like any risk assessment, a DSE assessment should apply controls in the right order:

1. Eliminate — can the task be redesigned so prolonged screen use is reduced?
2. Substitute — could a better-specified chair, monitor, or input device remove the risk at source?
3. Engineering controls — adjustable furniture, monitor arms, document holders, anti-glare screens, improved lighting
4. Administrative controls — job rotation, scheduled breaks away from the screen, task variety, training on posture
5. PPE (last resort) — in DSE terms this rarely applies, though prescription glasses required specifically for DSE work must be provided by the employer if a user requests an eye test and a specific need is identified

Eye Tests and Glasses

Employers must offer users a free eye test (by a registered optician) on request and at regular intervals. If the test shows the worker needs corrective lenses specifically for DSE work and their normal prescription does not cover this, the employer must contribute to the cost of a basic pair of corrective appliances. "Designer frames" go beyond what the law requires.

Breaks and Rest

The Regulations require that users have adequate breaks or changes of activity. The HSE advises short, frequent breaks are more effective than fewer, longer ones — for example, a five- to ten-minute break away from the screen each hour is generally preferable to a single long break. This does not mean workers must stop work; changing to a non-screen task counts.

When to Reassess

A DSE assessment is not a one-off document. You should review it when:

• A user moves to a new workstation or starts a new role
• There is a significant change in equipment, furniture, or software
• A user reports symptoms such as eye strain, headaches, or upper limb discomfort
• You have reason to suspect the existing assessment is no longer valid

Record Keeping

The general rule under the Management Regulations applies: if you have five or more employees, you must record the significant findings of risk assessments. Even with fewer employees, keeping a written record is good practice and makes review much easier.

Homeworkers and Hybrid Workers

The DSE Regulations apply regardless of where the work takes place. If a worker habitually uses a screen at home, the employer has the same assessment duties. Homeworker assessments can often be completed using a self-assessment checklist, but the employer must still act on any significant risks identified — not simply file the form and move on.

Getting DSE assessments right protects your workers from preventable musculoskeletal disorders, eye strain, and stress-related conditions. Done properly, with genuine follow-up action, they are one of the more straightforward ways to demonstrate that you take your workforce's wellbeing seriously.