Otot ekstraokuler memegang peranan penting dalam sistem visual, yaitu dengan memfasilitasi kesejajaran binokular yang penting untuk stereopsis dan mempertahankan target visual agar bayangan tepat jatuh di fovea. Strabismus merupakan suatu kelainan dimana tidak ditemukannya kesejajaran visual aksis pada kedua mata yang dapat disebabkan oleh kelainan pada otot ekstraokuler itu sendiri dimana salah satu atau lebih dari otot-otot tersebut tidak dapat berfungsi dengan baik. Inferior oblique overaction (IOOA) sering ditemukan dibanding semua overaksi otot ekstraokuler dan sering menyertai strabismus horizontal.1,2
IOOA ditandai dengan adanya overelevasi pada saat adduksi. Saat memeriksa versi pada seorang pasien, dapat ditemukan suatu up shoot yang nyata saat mata bergerak adduksi, kelainan ini dapat terjadi unilateral atau bilateral, dan dinamakan inferior oblique overaction atau strabismus sursoadductorius. IOOA disebut sebagai primer bila tidak terkait dengan paralisis otot oblik superior. Disebut sekunder bila disertai parese atau palsy dari antagonisnya, otot oblik superior.3,4,5
IOOA terkait dengan deviasi horizontal. IOOA dilaporkan terjadi pada sekitar 70% pasien dengan esotropia dan 30% pasien dengan eksotropia. Penyebab IOOA primer ini masih belum jelas.6
IOOA juga dapat terkait dengan eksotropia baik itu intermiten atau konstan, atau dapat terjadi sebagai overaksi dari muskulus oblik inferior saja tanpa jenis strabismus lainnya. IOOA tanpa strabismus lainnya mungkin akibat suatu congenital superior oblique palsy. Bila tes headtilt negatif mengindikasikan suatu IOOA primer. Karena parese oblik superior akan menghasilkan IOOA, pembedaan antara overaksi dari muskulus oblik inferior akibat parese oblik superior dapat menjadi sulit.7,8
Pada kasus dengan IOOA, perlu dilakukan suatu prosedur untuk melemahkan otot tersebut. Prosedur ini dapat dilakukan dengan teknik reses, disinsersi, miektomi, miotomi, transposisi anterior atau teknik denervasi dan ekstirpasi.5
Pada makalah ini, akan dibahas mengenai anatomi dan fisiologi muskulus oblik inferior, manifestasi klinis, differensial diagnosis, dan penatalaksanaan inferior oblique overaction.
Retina - Congenital anomalies and RD by Ashith Tripathi Ashith Tripathi
This ppt includes history of retina, layers, rods and cons, retinal embryogenesis etc.
In Congenital anomalies, including Coloboma, Congenital pigmentation of retina, Medullated nerve fibres, Albinism and Retinal Detechment.
Accommodation/ Accommodation of Eye, Measurement of Accommodation of Eye (hea...Bikash Sapkota
CLICK HERE TO DOWNLOAD FULL PPT ❤❤ https://healthkura.com/measurement-of-accommodation-of-eye/ ❤❤
Dear viewers Check Out my other piece of works at ❤❤❤ https://healthkura.com ❤❤❤
Measurement of Accommodation of eye:
Amplitude, Facility,
Relative Accommodation, Fatigue, Lag,
Dynamic Retinoscopy
Presentation Layout:
-Introduction to accommodation of eye
-Mechanism
-Components
-Measurement of accommodation of eye
- Amplitude
- Facility
- Relative accommodation
- Lag
-Dynamic Retinoscopy
Accommodation
-dioptric adjustment of the crystalline lens of the eye
- to obtain clear vision for a given target of regard
-process by which the refractive power of eye is altered
- to ensure a clear retinal image
For further reading
-Clinical Procedures in Optometry by J.D. Bartlett, J.B. Eskridge, J.F. Amos
-Primary Care Optometry by Theodere Grosvenor
-Borish’s Clinical Refraction by W.J. Benjamin
-Clinical Procedures for Ocular examination by Carlson et al
-American Academy of Ophthalmology
-Optometric Clinical Practice Guideline by American Optometric Association
-Internet
Follow me to get in touch with optometric and ophthalmic updates
Otot ekstraokuler memegang peranan penting dalam sistem visual, yaitu dengan memfasilitasi kesejajaran binokular yang penting untuk stereopsis dan mempertahankan target visual agar bayangan tepat jatuh di fovea. Strabismus merupakan suatu kelainan dimana tidak ditemukannya kesejajaran visual aksis pada kedua mata yang dapat disebabkan oleh kelainan pada otot ekstraokuler itu sendiri dimana salah satu atau lebih dari otot-otot tersebut tidak dapat berfungsi dengan baik. Inferior oblique overaction (IOOA) sering ditemukan dibanding semua overaksi otot ekstraokuler dan sering menyertai strabismus horizontal.1,2
IOOA ditandai dengan adanya overelevasi pada saat adduksi. Saat memeriksa versi pada seorang pasien, dapat ditemukan suatu up shoot yang nyata saat mata bergerak adduksi, kelainan ini dapat terjadi unilateral atau bilateral, dan dinamakan inferior oblique overaction atau strabismus sursoadductorius. IOOA disebut sebagai primer bila tidak terkait dengan paralisis otot oblik superior. Disebut sekunder bila disertai parese atau palsy dari antagonisnya, otot oblik superior.3,4,5
IOOA terkait dengan deviasi horizontal. IOOA dilaporkan terjadi pada sekitar 70% pasien dengan esotropia dan 30% pasien dengan eksotropia. Penyebab IOOA primer ini masih belum jelas.6
IOOA juga dapat terkait dengan eksotropia baik itu intermiten atau konstan, atau dapat terjadi sebagai overaksi dari muskulus oblik inferior saja tanpa jenis strabismus lainnya. IOOA tanpa strabismus lainnya mungkin akibat suatu congenital superior oblique palsy. Bila tes headtilt negatif mengindikasikan suatu IOOA primer. Karena parese oblik superior akan menghasilkan IOOA, pembedaan antara overaksi dari muskulus oblik inferior akibat parese oblik superior dapat menjadi sulit.7,8
Pada kasus dengan IOOA, perlu dilakukan suatu prosedur untuk melemahkan otot tersebut. Prosedur ini dapat dilakukan dengan teknik reses, disinsersi, miektomi, miotomi, transposisi anterior atau teknik denervasi dan ekstirpasi.5
Pada makalah ini, akan dibahas mengenai anatomi dan fisiologi muskulus oblik inferior, manifestasi klinis, differensial diagnosis, dan penatalaksanaan inferior oblique overaction.
Retina - Congenital anomalies and RD by Ashith Tripathi Ashith Tripathi
This ppt includes history of retina, layers, rods and cons, retinal embryogenesis etc.
In Congenital anomalies, including Coloboma, Congenital pigmentation of retina, Medullated nerve fibres, Albinism and Retinal Detechment.
Accommodation/ Accommodation of Eye, Measurement of Accommodation of Eye (hea...Bikash Sapkota
CLICK HERE TO DOWNLOAD FULL PPT ❤❤ https://healthkura.com/measurement-of-accommodation-of-eye/ ❤❤
Dear viewers Check Out my other piece of works at ❤❤❤ https://healthkura.com ❤❤❤
Measurement of Accommodation of eye:
Amplitude, Facility,
Relative Accommodation, Fatigue, Lag,
Dynamic Retinoscopy
Presentation Layout:
-Introduction to accommodation of eye
-Mechanism
-Components
-Measurement of accommodation of eye
- Amplitude
- Facility
- Relative accommodation
- Lag
-Dynamic Retinoscopy
Accommodation
-dioptric adjustment of the crystalline lens of the eye
- to obtain clear vision for a given target of regard
-process by which the refractive power of eye is altered
- to ensure a clear retinal image
For further reading
-Clinical Procedures in Optometry by J.D. Bartlett, J.B. Eskridge, J.F. Amos
-Primary Care Optometry by Theodere Grosvenor
-Borish’s Clinical Refraction by W.J. Benjamin
-Clinical Procedures for Ocular examination by Carlson et al
-American Academy of Ophthalmology
-Optometric Clinical Practice Guideline by American Optometric Association
-Internet
Follow me to get in touch with optometric and ophthalmic updates
The presentation is the continued part of Color Theory section. In this part you can learn about the history of the color, how color theory established & evaluation of color theory, Physiological Principles of color, or Emotional Response of Colors.
structure and fuction of eyes and ears,types of memory,sharpe memory,attentionUmarKhan422
The external covering of the eyeball comprises of a generally intense, white layer called the sclera (or white of the eye). Close to the front of the eye, in the zone secured by the eyelids, the sclera is secured by a slim, straightforward layer (conjunctiva), which rushes to the edge of the cornea.
Prepared by: Group 1
Leader:
Bau, Ella Mae G.
Members:
Adem, Angelie Lyka L.
Amper, Catherine Mae S.
Atienza, Trisha Lane M.
Babela, Ma. Ella V.
Bagang, Aleli M.
Bartolome, Kristine Joy G.
Bayani, Emanuel M.
Cabrera, Kathleen Anne A.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2. B.) Structural Description of the Eyes: The Process of Seeing
Light rays enter the eye, pass through the glassy corneas, then the watery liquid
called the aqueous humor, the pupil, and the lens. The pupils contract or dilate
depending upon the light intensity.
3. The eyeball is covered by 3 coats:
1. The sclerotic coat is the outer tough covering
2. The chloroid coat is the heavily-pigmented layer which keeps out all light except the
pupil
3. The retina is the photoreceptor that translates light stimulus into nerve impulses
C. Visual Phenomena
1. Inverted retinal image:
Light waves that fall obliquely on a surface two media of different densities refract
and converge at the pasterior focal point. The rays coming from the upper part of the stimuli
are refracted to the lower portion of retina: light waves from the lower part of the stimuli are
refracted to the upper part of the retina an inverted retina image is formed.
2. Visual Acuity
- deals the ability of the retina to distinguish differences in stimulation.
- 3 factors of Visual Acuity
a.) size
b.) illumination
c.) proximity
4. 3. Visual Accomodation
- process of adjusting the lenses of the eyes to varying distances within the visual field to
obtain a clear vision.
4. Visual Adaptation
- this is due to the difference action between the rods and cones.
- Adaptation to light takes shorter than adaptation to the dark.
- Adaptation to light is called photophia while adaptation to dark is called scotopia.
D.) Common Visual Deffects
1. Monocular Defects ( Faulty eye structure )
a.) Hyperopia or far-sightedness – this defect, the eyeballs are short and the images focused
at the back of the retina. To correct this, convex lenses may be used.
b.) Astigmatism – may be due to the uneven curvature of the cornea of the lenses.
Cylindrical lenses are often prescribed.
d.) Cross-eyedness or strabismus –here there is muscle imbalance causing the eyes to turn
inward.
e.) Presbyopia or old-sightedness – is a condition where the lenses harden and lose the
ability to accommodate.
5. 2. Visual Abnormalities (functional and organic)
a.) Hemianopsia. There is a blindness to one side of the visual field due to lesions in the
optic tract.
b.) Scotoma – condition where there a blind spots in the visual field.
c.) Visual paresthesia – condition where there are optic sensations.
d.) Color blindness – certain color are seen as black or green.
A normal person can see the light-dark called trichromat.
A drichromat on the other hand lacks one system partially color blind.
The monochromat is a totally color-blind person.
e.) Night blindness – defect where there is the inability to see well at night due to the
track of Vitamin A.
E.) Color Vision
- originated by the famous scientist Sir Isaac Newton
- By passing through white light through a triangular prism and getting the color of the
spectrum.
6. Afterimages
- the so-called afterimages are due to the neural action still travelling to the
brain in that very small portion of a second as we transfer our gaze at a different.
- two types of Afterimages: positive and negative
Contrast Effects
- are maximal when the brightness of the stimulus and its surrounding is equal
Additive and Subtractive Mixtures
- colored stimulus may actually becomposed of several wave lengths.
- The mixture of the blue and yellow pigment reflects only green all the others
are subtracted by one of the pigments.
- Additive mixtures as in mixtures of light, color are projected together upon the
same white surface which reflects all the wave lengths.
7. F.) Theories of Color vision
1. Young Helmotz Theory
a.) Three fiber theory
- Thomas Young, a physicist combining three fundamental or primary color red, blue, and
green.
- He assumed the existence of three different kinds of nervous fibers in the retina that
react specifically to these color with their corresponding perceptors in the brain center.
- This theory was further developed by Ludwig on Helmotz because of the impossibility of
obtaining were raised against the theory.
b.) Theory of photo-chemical substances
- According to this theory, every retinal receptor capable of arousing a visual sensation
is endowed with three different susbstances of a photo-chemical nature capable of
developing any of the primary color.
2. Hering Theory (also called opponent-color theory)
- Hering (physiologist) impressed by color pairs and so proposed three processes their
building up phase (anabolic) would yield the other.
8. 3. Wundt’s Theory
Wundt in 1874 proposed that every retinal excitation involves two
different stimulation processes one chromatic and one achromatic. Chromatic
sensations are produced by strong and weak stimuli while achromatic processes
are developed only by moderate stimuli.
4. Von Kries Theory
According to the theory of Von Kries, vision is due to the action of the
rods and cones in the nerve endings of optic nerve.
5. Ladd-Franklin Theory
This theory postulates four primaries red, green, yellow, and blue. It
assumes that the primitive eye was color blind (a cone free eye) and that the
yellow and blue receptors evolved from the primitive rods with further evolution
producing red and green sensitive receptors, the latter having evolved from
yellow processes.
9. Parts of the Eye
Vitereous humor – as the light reaches the retina, it crosses a clear fluid.
Accommodation – lens changes its shape upon focusing in near or far image.
Light rays – bent by the lens to meet a point to the retina.
- The image will be out of focus if the rays meet in front of the retina
(nearsighted) or behind the retina (farsighted)
10. Process of Accommodation
Retina – network of cells containing neurons, ganglion cells, and photoreceptors.
Rods and Cones – after processing the neurons, the neural activity reaches the
photoreceptor.
Photoreceptor – is the origin of visual responses.
Optic disk (blind spot) – the axons of the ganglion carry all visual information to the
brain by first converging.
Optic nerve – information that sent to the brain through a bundle of nerve fibers.
Optic chasm – optic nerves leave the two eyeballs and meet at a junction referred.
11. Color Vision
- The sun projects wavelengths of light
- The fundamental color, marked by the intensity of wavelength of the light.
- Neutral color (black, white, and gray) not accepted as hues because no
wavelength dominates in them.
2. Audition
A. Stimulus: Sound Waves
- Sounds are forms of energy activated when objects vibrate.
- Vibrating objects move in one direction pushing the air in front of it.
Compression wave – the crowding motion that moves farther and farther out
from the vibrating object.
Rarefaction wave – the zone of rarefied air moving away and away from the
vibrating bodies reproduces.
- One compression and one rarefaction comprise one sound wave.
- Sound travels faster in a warm medium than in a cool one.
12. Visual Sensation
Parts and Functions
Light enters first by passing through the cornea, the transparent productive
covering curved tissue in front of the eye. Behind the cornea, the light continues
to the anterior (front) chamber which contains watery liquid (aqueous humor) to
provide nutrients and keep the cornea moist. The pupil controls the amount of
light by constricting (closing) on too much light dilating (opening) under dark
condition. The iris is the colored muscles of the eye responsible for reducing
(constricting) or enlarging (dilating) the size of the pupil. The lens is an elastic
cured structure that bends light rays in order to focus a clear image to retina.
Saturation – associated with the purity color.
Common Visual defects – any faulty optical mechanism will result in a certain
visual defect. The most common eye defects are hyperopia, myopia, and
astigmatism.
Color blindness – some people have defects in their color vision. There are 2
kinds, the totally color-blind and the partially color blind.