06/02/2026
🐴👁️ “Why the Horse’s Eye Is a Masterpiece of Survival”
Eye Facts for the Year of the Horse - Dr Chua 7/2/2026
🐎 With the Year of the Horse approaching, here’s a delightful nugget of trivia to share around the reunion dinner table.
🐎 Horses have the largest eyes of any land mammal—about 2 inches (5 cm) across, larger than an elephant’s (~3.8 cm) and roughly twice the size of a human eye (~2.5 cm). Set on the sides of the head, these remarkable eyes create a near-360° panoramic view. Only two blind spots remain: directly beneath the nose and straight behind the tail.
🐎 Those large globes also behave like natural magnifying lenses. Objects nearby appear roughly 50% larger to a horse than they do to us.
🐎 But this is not vision in high definition. Horses are engineered to notice motion, not fine detail. A fluttering leaf or a scurrying mouse is instantly enlarged and flagged by the brain as a potential threat. Their eyes are built with a single priority: detect movement everywhere before it detects them.
🐎 The pupils complete this elegant survival system, their horizontally elongated rectangular shape—like a natural widescreen—providing:
• Wide view: The horizontal pupil provides an almost 360° field to detect danger.
• Stable horizon: Aligned with the horizon, it keeps vision level and clear even when the head is lowered to graze.
• Less glare: The iris “shade” (corpora nigra) acts like a visor, reducing harsh sunlight.
🐎 The horse’s eye is a triumph of evolutionary design — a reminder that vision is not just about seeing clearly, but about staying alive.
🧧For this Lunar New Year of the Horse, ISEC wishes everyone a prosperous year and healthy eyes.🧧
Insert: “The Qianlong Emperor in Ceremonial Armor on Horseback” is a 1758 ink-and-colour silk portrait by Giuseppe Castiglione (Lang Shining), commissioned by the Qing court, showing the 47-year-old Qianlong Emperor at a military review as a divinely sanctioned victor, blending imperial propaganda with Chinese and European styles.
🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇 🏇
🐴👁️ 《为什么说马的眼睛,是为“生存”而生的杰作》
马年眼睛冷知识 – 蔡鐘能眼科医生写于 7/2/2026
🐎 马年将至,这里有一则很适合在团圆饭桌上分享的有趣小知识。
🐎 马拥有所有陆地哺乳动物中最大的眼睛,直径约2英寸(5厘米),比大象的眼睛(约3.8厘米)还大,几乎是人类眼睛(约2.5厘米)的两倍。由于眼睛长在头部两侧,它们拥有接近360°的全景视野。只有两个地方看不到:鼻子正下方,以及尾巴正后方。
🐎 这双大眼睛就像自带放大镜。靠近的物体,在马眼中看起来比在人眼中大约大50%。
🐎 但这并不代表它们看得更清晰。马的视觉不是为了看细节,而是为了察觉动作。一片飘动的树叶、一只快速移动的小动物,都会被自动“放大”,并被大脑判定为潜在危险。它们的视觉系统只有一个目标:在危险发现它之前,先发现危险。
🐎 馬的瞳孔为这套精巧的生存系统画上完美句点,其横向拉长的长方形外观——宛如天然的“宽屏幕”——提供了:
•宽广视野: 横向的瞳孔带来近乎360°的视野,方便及早察觉危险。
• 稳定地平线: 瞳孔与地平线平行,即使低头吃草,视线依然保持水平清晰。
• 减少刺眼: 虹膜上的“遮阳结构”(corpora nigra)像遮阳帽一样,减弱强烈阳光。
🐎 马的眼睛,是进化设计的典范——提醒我们,视觉不只是为了看得清楚,更是为了活得安全。
🧧在这即将到来的农历马年,ISEC 祝大家新年吉祥,眼睛健康。🧧
插图:《乾隆戒装骑马图》是一幅作于1758年的绢本设色肖像画,由意大利耶稣会宫廷画家 Giuseppe Castiglione(郎世宁)奉清廷之命绘制。画中描绘47岁的乾隆皇帝在阅兵场上披着礼甲、骑乘战马,呈现出一位“天命所归”的胜利者形象。整幅作品既带有明显的帝国宣传意味,也展现了中西绘画风格的融合。
#蔡鐘能眼科医生 #马来西亚眼科医生 #国际眼科中心 #古晋眼科中心 #诗巫眼科中心 #马年