精巧な光学が,水母眼に搭載されている.
Dan-E Nilsson1, Lars Gislén, Melissa M Coates
1Department of Cell and Organism Biology, Lund University, Zoology Building, Helgonavägen 3, 22362 Lund, Sweden. dan-e.nilsson@cob.lu.se
Nature
|May 13, 2005
まとめ
ボックスメダウスは,細かく調整されたレンズで洗練された目をしており,単純な動物でも複雑な光学を示しています. 彼らのユニークな視覚システムは,レンズの進化の初期のドライバーを明らかにするかもしれません.
科学分野:
- マリン・バイオロジー マリン・バイオロジー
- 進化的光学とは
- 動物の行動 動物の行動
背景:
- キューボゾーン (箱の水母) は,魚のような独特な行動とロパリアと呼ばれる複雑な感覚器官を示しています.
- ロパリアには高度に発達した目があり,そのうちの2つはより高い動物のものと似ていますが,その機能は以前は知られませんでした.
研究 の 目的:
- ボックスメドウの目の光学特性と機能性能を調査するために.
- カニダリアンにおける高度な視覚システムの進化的意義を理解する.
主な方法:
- ボックスメダウスのレンズ内の屈折指数グラデーションの分析.
- 眼球構造のイメージング性能評価. 眼球構造のイメージング性能評価. 眼球構造のイメージング性能評価. 眼球構造のイメージング性能評価.
- 網膜の位置と光受容体受容領域の検査.
主要な成果:
- ボックスメダウスのレンズは,屈折指数グラデーションを備えており,ほぼ偏差のないイメージングを可能にします.
- 鋭いイメージングにもかかわらず,網膜の配置は,広範囲で複雑な光受容体受容領域をもたらします.
- この光学的な洗練は,先進的な双方向性フィラで発見されたものと競合する.
結論:
- ボックスメダウスは高度な視覚光学を有しており,単純な動物における複雑性のこれまでの概念に挑戦しています.
- 特殊な受容場は,特定の視覚的なタスクに適応することができる.
- 複雑な受容場調整は,動物のレンズの進化の原始的な原動力である可能性があります.
関連する概念動画
Imaging Biological Samples with Optical Microscopy
9.1K
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
9.1K
Super-resolution Fluorescence Microscopy
12.3K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
12.3K
Angle Closure Glaucoma: Treatment
1.6K
Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
1.6K
Accessory Structures of the Eye
4.3K
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
4.3K
Focusing of Light in the Eye
6.2K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
6.2K


