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What do blind people see? It’s common for a sighted person to wonder or for a blind person to wonder whether the experience is the same for others without sight. There is no single answer to the question because there are different degrees of blindness.
A person who has never had sight doesn’t see. Samuel, who was born blind, tells ThoughtCo that saying that a blind person sees black is incorrect because that person often has no other sensation of sight to compare against. “It’s just nothingness,” he says. For a sighted person, it can be helpful to think of it like this: Close one eye and use the open eye to focus on something. What does the closed eye see? Nothing. Another analogy is to compare a blind person’s sight to what you see with your elbow.
People who have lost their sight have different experiences. Some describe seeing complete darkness, like being in a cave. Some people see sparks or experience vivid visual hallucinations (幻觉) that may take the form of recognizable shapes, random shapes, and colors, or flashes of light.
In addition to total blindness, there is functional blindness. Definitions of functional blindness vary from one country to the next. The World Health Organization defines blindness as presenting visual acuity (敏锐度) worse than 3/60. What functionally blind people see depends on the severity of blindness and the form of impairment.
A person may be able to see large objects and people, but they are out of focus. A legally blind person may see colors or see in focus at a certain distance (e.g., be able to count fingers in front of the face). In other cases, color acuity may be lost or all vision is hazy. The experience is highly variable. Joey, who has 20/400 vision, tells ThoughtCo that he “constantly sees neon speckles that are always moving and changing colors.”
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1.1. What determines a blind person’s visual experience?
A Their medical history.
B The country they live in.
C The degree of blindness.
D Their age of losing sight.
解析：选C。C 细节理解题。原文明确提到“because there are different degrees of blindness”，说明失明程度决定视觉体验。干扰项A（无中生有）、B（张冠李戴，后文提到国家差异是功能性失明的定义）、D（主观臆断，未提及年龄影响）。故选C。
2.2. The word “analogy” in Paragraph 2 refers to ______.
A a comparison method
B a medical examination
C a sensory organ
D a scientific theory
解析：选A。A 词义猜测题。上下文通过“think of it like this”和“compare...to what you see with your elbow”可知，“analogy”是类比或比较方法。干扰项B（望文生义）、C（无中生有）、D（故意夸张）。故选A。
3.3. What is the main focus of Paragraph 4?
A The causes of functional blindness.
B WHO’s role in defining blindness.
C Functional blindness definitions.
D How colors affect blind people.
解析：选C。C 段落大意题。根据第四段内容可知，该段围绕功能性失明的定义（如WHO标准）和不同表现展开。干扰项A（文不对题，未提原因）、B（扩缩范围，WHO只是部分内容）、D（主观臆断，颜色仅是细节）。故选C。
4.4. What is a possible feature of legally blind people?
A Complete darkness perception.
B Ability to count nearby fingers.
C Seeing through medical devices.
D No color recognition at all.
解析：选B。B 推理判断题。第五段明确举例“legally blind person may see in focus at a certain distance (e.g., be able to count fingers in front of the face)”，说明他们可能在特定距离有清晰视觉。故选B。
