Pessimist meaning: pessimism and dark sunglasses

Pessimist Meaning: Pessimism, Optimism and Dark Sunglasses

Updated 28/10/2026 · 4 min read

Anyone who is pessimistic expects the worst and is called a pessimist, or an eternal pessimist if it never lets up. Here you can read what pessimist meaning and pessimism really involve, how a pessimist differs from an optimist and why a pinch of gloom can be useful. At the end it gets literal: dark sunglasses, lens categories and UV400.

Key points at a glance

A pessimist expects things to go wrong; an optimist expects things to turn out well. A realist weighs both up.
A little pessimism helps with planning and preparing. Too much of it can hold you back.
With dark sunglasses, UV400 and CE count, not the tint. Category 4 is not for driving.

Pessimist meaning: what is a pessimist?

The word comes from the Latin “pessimum”, the worst. Pessimism is a general outlook in which you tend to expect the negative. In everyday terms, a pessimist is someone who sees the glass as half empty and is not surprised by bad news. This is first of all a character trait and not an illness, and most people swing between moods depending on the situation.

Pessimist: expects things to go wrong more often than not.
Optimist: expects good things, sees the glass as half full and takes life more lightly.
Realist: weighs things up without leaning to either side.

Optimists come across as easygoing and are usually better liked. Both outlooks have their place, because the world is neither all black nor all white.

Eternal pessimist: what does it mean?

An eternal pessimist, sometimes called a perpetual pessimist, almost always expects the worst, whatever the circumstances. The counterpart is the eternal optimist, who keeps hoping for the best however often things go wrong. In German, seeing the dark side is called “schwarzsehen”, literally “seeing black”.

Optimist vs pessimist: what pessimists do well

Pessimists have a poor reputation, yet their outlook has strengths in moderation:

They plan more carefully. If you expect hiccups, you often have not just a plan B but a plan C.
They prepare. In psychology it is called “defensive pessimism” when you imagine what could go wrong and take precautions in advance.
They are often empathetic. If you know doubt and worry yourself, you tend to meet other people’s worries with more understanding.
They enjoy good news more. If you expected little, a positive turn comes as a bigger surprise.

When seeing black becomes too much

Worries can be a driving force: if you think things through, you often know sooner what you want to avoid. Too much pessimism, however, can hold you back and feed brooding. The middle ground usually works best: enough scepticism to prepare and enough hope to carry on after a setback. If you feel for a longer time that you only see the dark side, or feel low or anxious, talk to a doctor about it.

Seeing black with sunglasses: tint, lens category and UV400

Literally, you see black through dark lenses. Two things need to be kept apart here: how dark a lens is and how well it filters UV radiation.

Dark does not automatically mean UV filter

The tint tells you how much visible light passes through the lens, not how much UV radiation. Even very dark lenses can let UV radiation through. So rely on the labelling: UV400 means the lenses filter UV radiation up to 400 nanometres. The CE mark, or the UKCA mark in Great Britain, shows that the sunglasses meet the requirements for sunglasses under the standard EN ISO 12312-1. What sets UVA, UVB and UVC apart is explained in What You Need to Know about UV Radiation.

Lens categories 0 to 4: how dark should the lens be?

Category 0 (80–100% of the light): clear or almost clear lenses, fashion, dull weather
Category 1 (43–80%): light tint for cloudy days and the city
Category 2 (18–43%): medium sunlight, everyday use
Category 3 (8–18%): bright sun, summer, the beach, holidays in the south
Category 4 (3–8%): extreme brightness in high mountains and on glaciers, not suitable for driving

The category is usually printed on the inside of the arm, for example as “Cat. 3”. For everyday use, category 2 or 3 is usually the right choice. Category 4 sunglasses do not belong on the road, whether in the car or on a bike. At dusk and in the dark, dark lenses are generally not suitable. Polarised lenses are a separate feature: they reduce glare from reflections, for example on water or a wet road (more on polarised lenses). What to look for in UV400, CE and build quality is covered in Cheap Sunglasses with Good UV Protection.

Dark sunglasses in our shop

Our sunglasses currently include models from Ray-Ban, Oakley, Prada, Miu Miu and Gucci, among them favourites such as the Ray-Ban Wayfarer and the Oakley Holbrook. Available colours are shown on each model’s page.

Black sunglasses in our shop